diff --git a/src/CodeGenerator/src/Generator/InputGenerator.php b/src/CodeGenerator/src/Generator/InputGenerator.php
index b9b6db316..038ebb607 100644
--- a/src/CodeGenerator/src/Generator/InputGenerator.php
+++ b/src/CodeGenerator/src/Generator/InputGenerator.php
@@ -429,7 +429,7 @@ private function inputClassRequestGetters(StructureShape $inputShape, ClassBuild
         if ($operation->hasBody()) {
             [$body['body'], $hasRequestBody, $overrideArgs] = $serializer->generateRequestBody($operation, $inputShape) + [null, null, []];
             if ($hasRequestBody) {
-                [$returnType, $requestBody, $args] = $serializer->generateRequestBuilder($inputShape) + [null, null, []];
+                [$returnType, $requestBody, $args] = $serializer->generateRequestBuilder($inputShape, true) + [null, null, []];
                 if ('' === trim($requestBody)) {
                     $body['body'] = '$body = "";';
                 } else {
diff --git a/src/CodeGenerator/src/Generator/ObjectGenerator.php b/src/CodeGenerator/src/Generator/ObjectGenerator.php
index f930a7bf7..878d851c7 100644
--- a/src/CodeGenerator/src/Generator/ObjectGenerator.php
+++ b/src/CodeGenerator/src/Generator/ObjectGenerator.php
@@ -106,7 +106,7 @@ public function generate(StructureShape $shape, bool $forEndpoint = false): Clas
 
         $serializer = $this->serializer->get($shape->getService());
         if ($this->isShapeUsedInput($shape)) {
-            [$returnType, $requestBody, $args] = $serializer->generateRequestBuilder($shape) + [null, null, []];
+            [$returnType, $requestBody, $args] = $serializer->generateRequestBuilder($shape, false) + [null, null, []];
             $method = $classBuilder->addMethod('requestBody')->setReturnType($returnType)->setBody($requestBody)->setPublic()->setComment('@internal');
             foreach ($args as $arg => $type) {
                 $method->addParameter($arg)->setType($type);
@@ -191,36 +191,60 @@ private function namedConstructor(StructureShape $shape, ClassBuilder $classBuil
 
         $constructor->addParameter('input')->setType('array');
 
+        // To throw an exception in an expression, we need to use a method to support PHP 7.x
+        $needsThrowMethod = false;
+
         $constructorBody = '';
         foreach ($shape->getMembers() as $member) {
             $memberShape = $member->getShape();
             if ($memberShape instanceof StructureShape) {
                 $objectClass = $this->generate($memberShape);
-                $constructorBody .= strtr('$this->PROPERTY = isset($input["NAME"]) ? CLASS::create($input["NAME"]) : null;' . "\n", ['PROPERTY' => GeneratorHelper::normalizeName($member->getName()), 'NAME' => $member->getName(), 'CLASS' => $objectClass->getName()]);
+                $memberCode = strtr('CLASS::create($input["NAME"])', ['NAME' => $member->getName(), 'CLASS' => $objectClass->getName()]);
             } elseif ($memberShape instanceof ListShape) {
                 $listMemberShape = $memberShape->getMember()->getShape();
 
                 // Check if this is a list of objects
                 if ($listMemberShape instanceof StructureShape) {
                     $objectClass = $this->generate($listMemberShape);
-                    $constructorBody .= strtr('$this->PROPERTY = isset($input["NAME"]) ? array_map([CLASS::class, "create"], $input["NAME"]) : null;' . "\n", ['PROPERTY' => GeneratorHelper::normalizeName($member->getName()), 'NAME' => $member->getName(), 'CLASS' => $objectClass->getName()]);
+                    $memberCode = strtr('array_map([CLASS::class, "create"], $input["NAME"])', ['NAME' => $member->getName(), 'CLASS' => $objectClass->getName()]);
                 } else {
-                    $constructorBody .= strtr('$this->PROPERTY = $input["NAME"] ?? null;' . "\n", ['PROPERTY' => GeneratorHelper::normalizeName($member->getName()), 'NAME' => $member->getName()]);
+                    $memberCode = strtr('$input["NAME"]', ['NAME' => $member->getName()]);
                 }
             } elseif ($memberShape instanceof MapShape) {
                 $mapValueShape = $memberShape->getValue()->getShape();
 
                 if ($mapValueShape instanceof StructureShape) {
                     $objectClass = $this->generate($mapValueShape);
-                    $constructorBody .= strtr('$this->PROPERTY = isset($input["NAME"]) ? array_map([CLASS::class, "create"], $input["NAME"]) : null;' . "\n", ['PROPERTY' => GeneratorHelper::normalizeName($member->getName()), 'NAME' => $member->getName(), 'CLASS' => $objectClass->getName()]);
+                    $memberCode = strtr('array_map([CLASS::class, "create"], $input["NAME"])', ['NAME' => $member->getName(), 'CLASS' => $objectClass->getName()]);
                 } else {
-                    $constructorBody .= strtr('$this->PROPERTY = $input["NAME"] ?? null;' . "\n", ['PROPERTY' => GeneratorHelper::normalizeName($member->getName()), 'NAME' => $member->getName()]);
+                    $memberCode = strtr('$input["NAME"]', ['NAME' => $member->getName()]);
                 }
             } else {
-                $constructorBody .= strtr('$this->PROPERTY = $input["NAME"] ?? null;' . "\n", ['PROPERTY' => GeneratorHelper::normalizeName($member->getName()), 'NAME' => $member->getName()]);
+                $memberCode = strtr('$input["NAME"]', ['NAME' => $member->getName()]);
+            }
+            if ($member->isRequired()) {
+                $fallback = strtr('$this->throwException(new InvalidArgument(\'Missing required field "NAME".\'))', ['NAME' => $member->getName()]);
+                $classBuilder->addUse(InvalidArgument::class);
+                $needsThrowMethod = true;
+            } else {
+                $fallback = 'null';
             }
+            $constructorBody .= strtr('$this->PROPERTY = isset($input["NAME"]) ? MEMBER_CODE : FALLBACK;' . "\n", [
+                'PROPERTY' => GeneratorHelper::normalizeName($member->getName()),
+                'NAME' => $member->getName(),
+                'MEMBER_CODE' => $memberCode,
+                'FALLBACK' => $fallback,
+            ]);
         }
         $constructor->setBody($constructorBody);
+
+        if ($needsThrowMethod) {
+            $throwMethod = $classBuilder->addMethod('throwException');
+            $throwMethod->setPrivate();
+            $throwMethod->addComment('@return never');
+            $throwMethod->addParameter('exception')->setType(\Throwable::class);
+            $throwMethod->setBody('throw $exception;');
+        }
     }
 
     /**
@@ -249,12 +273,12 @@ private function addProperties(StructureShape $shape, ClassBuilder $classBuilder
                 $enumClassName = $this->enumGenerator->generate($memberShape);
                 $classBuilder->addUse($enumClassName->getFqdn());
             }
-            $getterSetterNullable = true;
+            $getterSetterNullable = null;
 
             if ($memberShape instanceof StructureShape) {
                 $this->generate($memberShape);
             } elseif ($memberShape instanceof MapShape) {
-                $nullable = $getterSetterNullable = false;
+                $getterSetterNullable = false;
                 $mapKeyShape = $memberShape->getKey()->getShape();
                 if ('string' !== $mapKeyShape->getType()) {
                     throw new \RuntimeException('Complex maps are not supported');
@@ -271,7 +295,7 @@ private function addProperties(StructureShape $shape, ClassBuilder $classBuilder
                     $classBuilder->addUse($enumClassName->getFqdn());
                 }
             } elseif ($memberShape instanceof ListShape) {
-                $nullable = $getterSetterNullable = false;
+                $getterSetterNullable = false;
                 $memberShape->getMember()->getShape();
 
                 if (($memberShape = $memberShape->getMember()->getShape()) instanceof StructureShape) {
@@ -297,7 +321,10 @@ private function addProperties(StructureShape $shape, ClassBuilder $classBuilder
                 $deprecation = strtr('@trigger_error(\sprintf(\'The property "NAME" of "%s" is deprecated by AWS.\', __CLASS__), E_USER_DEPRECATED);', ['NAME' => $member->getName()]);
             }
 
-            if ($getterSetterNullable) {
+            $nullable = $nullable ?? !$member->isRequired();
+            $getterSetterNullable = $getterSetterNullable ?? $nullable;
+
+            if ($getterSetterNullable || !$nullable) {
                 $method->setBody($deprecation . strtr('
                         return $this->PROPERTY;
                     ', [
@@ -311,11 +338,10 @@ private function addProperties(StructureShape $shape, ClassBuilder $classBuilder
                 ]));
             }
 
-            $nullable = $nullable ?? !$member->isRequired();
             if ($parameterType && $parameterType !== $returnType && (empty($memberClassNames) || $memberClassNames[0]->getName() !== $parameterType)) {
-                $method->addComment('@return ' . $parameterType . ($nullable ? '|null' : ''));
+                $method->addComment('@return ' . $parameterType . ($getterSetterNullable ? '|null' : ''));
             }
-            $method->setReturnNullable($nullable);
+            $method->setReturnNullable($getterSetterNullable);
         }
 
         foreach ($forEndpointProps as $key => $ok) {
diff --git a/src/CodeGenerator/src/Generator/RequestSerializer/QuerySerializer.php b/src/CodeGenerator/src/Generator/RequestSerializer/QuerySerializer.php
index 5445bc47b..0d27e68ea 100644
--- a/src/CodeGenerator/src/Generator/RequestSerializer/QuerySerializer.php
+++ b/src/CodeGenerator/src/Generator/RequestSerializer/QuerySerializer.php
@@ -69,9 +69,9 @@ public function generateRequestBody(Operation $operation, StructureShape $shape)
         ]), true];
     }
 
-    public function generateRequestBuilder(StructureShape $shape): array
+    public function generateRequestBuilder(StructureShape $shape, bool $needsChecks): array
     {
-        $body = implode("\n", array_map(function (StructureMember $member) {
+        $body = implode("\n", array_map(function (StructureMember $member) use ($needsChecks) {
             if (null !== $member->getLocation()) {
                 return '';
             }
@@ -84,10 +84,15 @@ public function generateRequestBuilder(StructureShape $shape): array
                 MEMBER_CODE';
                 $inputElement = '$v';
             } elseif ($member->isRequired()) {
-                $body = 'if (null === $v = $this->PROPERTY) {
-                    throw new InvalidArgument(sprintf(\'Missing parameter "NAME" for "%s". The value cannot be null.\', __CLASS__));
+                if ($needsChecks) {
+                    $body = 'if (null === $v = $this->PROPERTY) {
+                        throw new InvalidArgument(sprintf(\'Missing parameter "NAME" for "%s". The value cannot be null.\', __CLASS__));
+                    }
+                    MEMBER_CODE';
+                } else {
+                    $body = '$v = $this->PROPERTY;
+                    MEMBER_CODE';
                 }
-                MEMBER_CODE';
                 $inputElement = '$v';
             } else {
                 $body = 'if (null !== $v = $this->PROPERTY) {
diff --git a/src/CodeGenerator/src/Generator/RequestSerializer/RestJsonSerializer.php b/src/CodeGenerator/src/Generator/RequestSerializer/RestJsonSerializer.php
index db07cf388..1abe0a450 100644
--- a/src/CodeGenerator/src/Generator/RequestSerializer/RestJsonSerializer.php
+++ b/src/CodeGenerator/src/Generator/RequestSerializer/RestJsonSerializer.php
@@ -68,9 +68,9 @@ public function generateRequestBody(Operation $operation, StructureShape $shape)
         return ['$bodyPayload = $this->requestBody(); $body = empty($bodyPayload) ? "{}" : \json_encode($bodyPayload, ' . \JSON_THROW_ON_ERROR . ');', true];
     }
 
-    public function generateRequestBuilder(StructureShape $shape): array
+    public function generateRequestBuilder(StructureShape $shape, bool $needsChecks): array
     {
-        $body = implode("\n", array_map(function (StructureMember $member) {
+        $body = implode("\n", array_map(function (StructureMember $member) use ($needsChecks) {
             if (null !== $member->getLocation()) {
                 return '';
             }
@@ -83,10 +83,15 @@ public function generateRequestBuilder(StructureShape $shape): array
                 MEMBER_CODE';
                 $inputElement = '$v';
             } elseif ($member->isRequired()) {
-                $body = 'if (null === $v = $this->PROPERTY) {
-                    throw new InvalidArgument(sprintf(\'Missing parameter "NAME" for "%s". The value cannot be null.\', __CLASS__));
+                if ($needsChecks) {
+                    $body = 'if (null === $v = $this->PROPERTY) {
+                        throw new InvalidArgument(sprintf(\'Missing parameter "NAME" for "%s". The value cannot be null.\', __CLASS__));
+                    }
+                    MEMBER_CODE';
+                } else {
+                    $body = '$v = $this->PROPERTY;
+                    MEMBER_CODE';
                 }
-                MEMBER_CODE';
                 $inputElement = '$v';
             } else {
                 $body = 'if (null !== $v = $this->PROPERTY) {
diff --git a/src/CodeGenerator/src/Generator/RequestSerializer/RestXmlSerializer.php b/src/CodeGenerator/src/Generator/RequestSerializer/RestXmlSerializer.php
index 2d519279a..09b68851c 100644
--- a/src/CodeGenerator/src/Generator/RequestSerializer/RestXmlSerializer.php
+++ b/src/CodeGenerator/src/Generator/RequestSerializer/RestXmlSerializer.php
@@ -93,9 +93,9 @@ public function generateRequestBody(Operation $operation, StructureShape $shape)
         ',  true, ['node' => \DOMNode::class]];
     }
 
-    public function generateRequestBuilder(StructureShape $shape): array
+    public function generateRequestBuilder(StructureShape $shape, bool $needsChecks): array
     {
-        $body = implode("\n", array_map(function (StructureMember $member) {
+        $body = implode("\n", array_map(function (StructureMember $member) use ($needsChecks) {
             if (null !== $member->getLocation()) {
                 return '';
             }
@@ -108,10 +108,15 @@ public function generateRequestBuilder(StructureShape $shape): array
                 MEMBER_CODE';
                 $inputElement = '$v';
             } elseif ($member->isRequired()) {
-                $body = 'if (null === $v = $this->PROPERTY) {
-                    throw new InvalidArgument(sprintf(\'Missing parameter "NAME" for "%s". The value cannot be null.\', __CLASS__));
+                if ($needsChecks) {
+                    $body = 'if (null === $v = $this->PROPERTY) {
+                        throw new InvalidArgument(sprintf(\'Missing parameter "NAME" for "%s". The value cannot be null.\', __CLASS__));
+                    }
+                    MEMBER_CODE';
+                } else {
+                    $body = '$v = $this->PROPERTY;
+                    MEMBER_CODE';
                 }
-                MEMBER_CODE';
                 $inputElement = '$v';
             } else {
                 $body = 'if (null !== $v = $this->PROPERTY) {
diff --git a/src/CodeGenerator/src/Generator/RequestSerializer/Serializer.php b/src/CodeGenerator/src/Generator/RequestSerializer/Serializer.php
index 2a4f9f635..8c6585abb 100644
--- a/src/CodeGenerator/src/Generator/RequestSerializer/Serializer.php
+++ b/src/CodeGenerator/src/Generator/RequestSerializer/Serializer.php
@@ -29,7 +29,7 @@ public function generateRequestBody(Operation $operation, StructureShape $shape)
      *
      * @return array{0: string, 1: string, 2?: array<string, string>}
      */
-    public function generateRequestBuilder(StructureShape $shape): array;
+    public function generateRequestBuilder(StructureShape $shape, bool $needsChecks): array;
 
     public function getHeaders(Operation $operation): string;
 }
diff --git a/src/Core/src/Sts/ValueObject/AssumedRoleUser.php b/src/Core/src/Sts/ValueObject/AssumedRoleUser.php
index 40c0b922d..6b261f445 100644
--- a/src/Core/src/Sts/ValueObject/AssumedRoleUser.php
+++ b/src/Core/src/Sts/ValueObject/AssumedRoleUser.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Core\Sts\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The identifiers for the temporary security credentials that the operation returns.
  */
@@ -29,8 +31,8 @@ final class AssumedRoleUser
      */
     public function __construct(array $input)
     {
-        $this->assumedRoleId = $input['AssumedRoleId'] ?? null;
-        $this->arn = $input['Arn'] ?? null;
+        $this->assumedRoleId = $input['AssumedRoleId'] ?? $this->throwException(new InvalidArgument('Missing required field "AssumedRoleId".'));
+        $this->arn = $input['Arn'] ?? $this->throwException(new InvalidArgument('Missing required field "Arn".'));
     }
 
     /**
@@ -53,4 +55,12 @@ public function getAssumedRoleId(): string
     {
         return $this->assumedRoleId;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Core/src/Sts/ValueObject/Credentials.php b/src/Core/src/Sts/ValueObject/Credentials.php
index eafc39ecb..74e316dc4 100644
--- a/src/Core/src/Sts/ValueObject/Credentials.php
+++ b/src/Core/src/Sts/ValueObject/Credentials.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Core\Sts\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Amazon Web Services credentials for API authentication.
  */
@@ -37,10 +39,10 @@ final class Credentials
      */
     public function __construct(array $input)
     {
-        $this->accessKeyId = $input['AccessKeyId'] ?? null;
-        $this->secretAccessKey = $input['SecretAccessKey'] ?? null;
-        $this->sessionToken = $input['SessionToken'] ?? null;
-        $this->expiration = $input['Expiration'] ?? null;
+        $this->accessKeyId = $input['AccessKeyId'] ?? $this->throwException(new InvalidArgument('Missing required field "AccessKeyId".'));
+        $this->secretAccessKey = $input['SecretAccessKey'] ?? $this->throwException(new InvalidArgument('Missing required field "SecretAccessKey".'));
+        $this->sessionToken = $input['SessionToken'] ?? $this->throwException(new InvalidArgument('Missing required field "SessionToken".'));
+        $this->expiration = $input['Expiration'] ?? $this->throwException(new InvalidArgument('Missing required field "Expiration".'));
     }
 
     /**
@@ -75,4 +77,12 @@ public function getSessionToken(): string
     {
         return $this->sessionToken;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Core/src/Sts/ValueObject/Tag.php b/src/Core/src/Sts/ValueObject/Tag.php
index 83d7649c4..d6791e459 100644
--- a/src/Core/src/Sts/ValueObject/Tag.php
+++ b/src/Core/src/Sts/ValueObject/Tag.php
@@ -41,8 +41,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -72,15 +72,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/AppSyncRuntime.php b/src/Service/AppSync/src/ValueObject/AppSyncRuntime.php
index e4d458f9a..e6bda58bc 100644
--- a/src/Service/AppSync/src/ValueObject/AppSyncRuntime.php
+++ b/src/Service/AppSync/src/ValueObject/AppSyncRuntime.php
@@ -30,8 +30,8 @@ final class AppSyncRuntime
      */
     public function __construct(array $input)
     {
-        $this->name = $input['name'] ?? null;
-        $this->runtimeVersion = $input['runtimeVersion'] ?? null;
+        $this->name = $input['name'] ?? $this->throwException(new InvalidArgument('Missing required field "name".'));
+        $this->runtimeVersion = $input['runtimeVersion'] ?? $this->throwException(new InvalidArgument('Missing required field "runtimeVersion".'));
     }
 
     /**
@@ -64,18 +64,22 @@ public function getRuntimeVersion(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         if (!RuntimeName::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "name" for "%s". The value "%s" is not a valid "RuntimeName".', __CLASS__, $v));
         }
         $payload['name'] = $v;
-        if (null === $v = $this->runtimeVersion) {
-            throw new InvalidArgument(sprintf('Missing parameter "runtimeVersion" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->runtimeVersion;
         $payload['runtimeVersion'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/AuthorizationConfig.php b/src/Service/AppSync/src/ValueObject/AuthorizationConfig.php
index a81f67c53..037384773 100644
--- a/src/Service/AppSync/src/ValueObject/AuthorizationConfig.php
+++ b/src/Service/AppSync/src/ValueObject/AuthorizationConfig.php
@@ -30,7 +30,7 @@ final class AuthorizationConfig
      */
     public function __construct(array $input)
     {
-        $this->authorizationType = $input['authorizationType'] ?? null;
+        $this->authorizationType = $input['authorizationType'] ?? $this->throwException(new InvalidArgument('Missing required field "authorizationType".'));
         $this->awsIamConfig = isset($input['awsIamConfig']) ? AwsIamConfig::create($input['awsIamConfig']) : null;
     }
 
@@ -64,9 +64,7 @@ public function getAwsIamConfig(): ?AwsIamConfig
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->authorizationType) {
-            throw new InvalidArgument(sprintf('Missing parameter "authorizationType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->authorizationType;
         if (!AuthorizationType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "authorizationType" for "%s". The value "%s" is not a valid "AuthorizationType".', __CLASS__, $v));
         }
@@ -77,4 +75,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/CachingConfig.php b/src/Service/AppSync/src/ValueObject/CachingConfig.php
index 63fc85c11..4c7f0078a 100644
--- a/src/Service/AppSync/src/ValueObject/CachingConfig.php
+++ b/src/Service/AppSync/src/ValueObject/CachingConfig.php
@@ -31,7 +31,7 @@ final class CachingConfig
      */
     public function __construct(array $input)
     {
-        $this->ttl = $input['ttl'] ?? null;
+        $this->ttl = $input['ttl'] ?? $this->throwException(new InvalidArgument('Missing required field "ttl".'));
         $this->cachingKeys = $input['cachingKeys'] ?? null;
     }
 
@@ -65,9 +65,7 @@ public function getTtl(): int
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->ttl) {
-            throw new InvalidArgument(sprintf('Missing parameter "ttl" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->ttl;
         $payload['ttl'] = $v;
         if (null !== $v = $this->cachingKeys) {
             $index = -1;
@@ -80,4 +78,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/DynamodbDataSourceConfig.php b/src/Service/AppSync/src/ValueObject/DynamodbDataSourceConfig.php
index 8e77782ee..ce718eebe 100644
--- a/src/Service/AppSync/src/ValueObject/DynamodbDataSourceConfig.php
+++ b/src/Service/AppSync/src/ValueObject/DynamodbDataSourceConfig.php
@@ -45,8 +45,8 @@ final class DynamodbDataSourceConfig
      */
     public function __construct(array $input)
     {
-        $this->tableName = $input['tableName'] ?? null;
-        $this->awsRegion = $input['awsRegion'] ?? null;
+        $this->tableName = $input['tableName'] ?? $this->throwException(new InvalidArgument('Missing required field "tableName".'));
+        $this->awsRegion = $input['awsRegion'] ?? $this->throwException(new InvalidArgument('Missing required field "awsRegion".'));
         $this->useCallerCredentials = $input['useCallerCredentials'] ?? null;
         $this->deltaSyncConfig = isset($input['deltaSyncConfig']) ? DeltaSyncConfig::create($input['deltaSyncConfig']) : null;
         $this->versioned = $input['versioned'] ?? null;
@@ -97,13 +97,9 @@ public function getVersioned(): ?bool
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->tableName) {
-            throw new InvalidArgument(sprintf('Missing parameter "tableName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tableName;
         $payload['tableName'] = $v;
-        if (null === $v = $this->awsRegion) {
-            throw new InvalidArgument(sprintf('Missing parameter "awsRegion" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->awsRegion;
         $payload['awsRegion'] = $v;
         if (null !== $v = $this->useCallerCredentials) {
             $payload['useCallerCredentials'] = (bool) $v;
@@ -117,4 +113,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/ElasticsearchDataSourceConfig.php b/src/Service/AppSync/src/ValueObject/ElasticsearchDataSourceConfig.php
index 5aeaf0b6f..33f72ddbd 100644
--- a/src/Service/AppSync/src/ValueObject/ElasticsearchDataSourceConfig.php
+++ b/src/Service/AppSync/src/ValueObject/ElasticsearchDataSourceConfig.php
@@ -30,8 +30,8 @@ final class ElasticsearchDataSourceConfig
      */
     public function __construct(array $input)
     {
-        $this->endpoint = $input['endpoint'] ?? null;
-        $this->awsRegion = $input['awsRegion'] ?? null;
+        $this->endpoint = $input['endpoint'] ?? $this->throwException(new InvalidArgument('Missing required field "endpoint".'));
+        $this->awsRegion = $input['awsRegion'] ?? $this->throwException(new InvalidArgument('Missing required field "awsRegion".'));
     }
 
     /**
@@ -61,15 +61,19 @@ public function getEndpoint(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->endpoint) {
-            throw new InvalidArgument(sprintf('Missing parameter "endpoint" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->endpoint;
         $payload['endpoint'] = $v;
-        if (null === $v = $this->awsRegion) {
-            throw new InvalidArgument(sprintf('Missing parameter "awsRegion" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->awsRegion;
         $payload['awsRegion'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/EventBridgeDataSourceConfig.php b/src/Service/AppSync/src/ValueObject/EventBridgeDataSourceConfig.php
index 591f5623e..6ef78a7d9 100644
--- a/src/Service/AppSync/src/ValueObject/EventBridgeDataSourceConfig.php
+++ b/src/Service/AppSync/src/ValueObject/EventBridgeDataSourceConfig.php
@@ -23,7 +23,7 @@ final class EventBridgeDataSourceConfig
      */
     public function __construct(array $input)
     {
-        $this->eventBusArn = $input['eventBusArn'] ?? null;
+        $this->eventBusArn = $input['eventBusArn'] ?? $this->throwException(new InvalidArgument('Missing required field "eventBusArn".'));
     }
 
     /**
@@ -47,11 +47,17 @@ public function getEventBusArn(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->eventBusArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "eventBusArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->eventBusArn;
         $payload['eventBusArn'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/LambdaDataSourceConfig.php b/src/Service/AppSync/src/ValueObject/LambdaDataSourceConfig.php
index 1ad75301c..fc6151f7e 100644
--- a/src/Service/AppSync/src/ValueObject/LambdaDataSourceConfig.php
+++ b/src/Service/AppSync/src/ValueObject/LambdaDataSourceConfig.php
@@ -21,7 +21,7 @@ final class LambdaDataSourceConfig
      */
     public function __construct(array $input)
     {
-        $this->lambdaFunctionArn = $input['lambdaFunctionArn'] ?? null;
+        $this->lambdaFunctionArn = $input['lambdaFunctionArn'] ?? $this->throwException(new InvalidArgument('Missing required field "lambdaFunctionArn".'));
     }
 
     /**
@@ -45,11 +45,17 @@ public function getLambdaFunctionArn(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->lambdaFunctionArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "lambdaFunctionArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->lambdaFunctionArn;
         $payload['lambdaFunctionArn'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/AppSync/src/ValueObject/OpenSearchServiceDataSourceConfig.php b/src/Service/AppSync/src/ValueObject/OpenSearchServiceDataSourceConfig.php
index 0f273e914..2ae215318 100644
--- a/src/Service/AppSync/src/ValueObject/OpenSearchServiceDataSourceConfig.php
+++ b/src/Service/AppSync/src/ValueObject/OpenSearchServiceDataSourceConfig.php
@@ -27,8 +27,8 @@ final class OpenSearchServiceDataSourceConfig
      */
     public function __construct(array $input)
     {
-        $this->endpoint = $input['endpoint'] ?? null;
-        $this->awsRegion = $input['awsRegion'] ?? null;
+        $this->endpoint = $input['endpoint'] ?? $this->throwException(new InvalidArgument('Missing required field "endpoint".'));
+        $this->awsRegion = $input['awsRegion'] ?? $this->throwException(new InvalidArgument('Missing required field "awsRegion".'));
     }
 
     /**
@@ -58,15 +58,19 @@ public function getEndpoint(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->endpoint) {
-            throw new InvalidArgument(sprintf('Missing parameter "endpoint" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->endpoint;
         $payload['endpoint'] = $v;
-        if (null === $v = $this->awsRegion) {
-            throw new InvalidArgument(sprintf('Missing parameter "awsRegion" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->awsRegion;
         $payload['awsRegion'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/AclConfiguration.php b/src/Service/Athena/src/ValueObject/AclConfiguration.php
index 5bc76cda0..5b3e385bb 100644
--- a/src/Service/Athena/src/ValueObject/AclConfiguration.php
+++ b/src/Service/Athena/src/ValueObject/AclConfiguration.php
@@ -31,7 +31,7 @@ final class AclConfiguration
      */
     public function __construct(array $input)
     {
-        $this->s3AclOption = $input['S3AclOption'] ?? null;
+        $this->s3AclOption = $input['S3AclOption'] ?? $this->throwException(new InvalidArgument('Missing required field "S3AclOption".'));
     }
 
     /**
@@ -58,9 +58,7 @@ public function getS3AclOption(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->s3AclOption) {
-            throw new InvalidArgument(sprintf('Missing parameter "S3AclOption" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->s3AclOption;
         if (!S3AclOption::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "S3AclOption" for "%s". The value "%s" is not a valid "S3AclOption".', __CLASS__, $v));
         }
@@ -68,4 +66,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/Column.php b/src/Service/Athena/src/ValueObject/Column.php
index 1a01a4641..7914585b2 100644
--- a/src/Service/Athena/src/ValueObject/Column.php
+++ b/src/Service/Athena/src/ValueObject/Column.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Athena\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains metadata for a column in a table.
  */
@@ -31,7 +33,7 @@ final class Column
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->type = $input['Type'] ?? null;
         $this->comment = $input['Comment'] ?? null;
     }
@@ -62,4 +64,12 @@ public function getType(): ?string
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/ColumnInfo.php b/src/Service/Athena/src/ValueObject/ColumnInfo.php
index 2522c565c..b02e39914 100644
--- a/src/Service/Athena/src/ValueObject/ColumnInfo.php
+++ b/src/Service/Athena/src/ValueObject/ColumnInfo.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\Athena\ValueObject;
 
 use AsyncAws\Athena\Enum\ColumnNullable;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * Information about the columns in a query execution result.
@@ -79,9 +80,9 @@ public function __construct(array $input)
         $this->catalogName = $input['CatalogName'] ?? null;
         $this->schemaName = $input['SchemaName'] ?? null;
         $this->tableName = $input['TableName'] ?? null;
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->label = $input['Label'] ?? null;
-        $this->type = $input['Type'] ?? null;
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
         $this->precision = $input['Precision'] ?? null;
         $this->scale = $input['Scale'] ?? null;
         $this->nullable = $input['Nullable'] ?? null;
@@ -159,4 +160,12 @@ public function getType(): string
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/CustomerContentEncryptionConfiguration.php b/src/Service/Athena/src/ValueObject/CustomerContentEncryptionConfiguration.php
index 37add0650..804fc9840 100644
--- a/src/Service/Athena/src/ValueObject/CustomerContentEncryptionConfiguration.php
+++ b/src/Service/Athena/src/ValueObject/CustomerContentEncryptionConfiguration.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Athena\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Specifies the KMS key that is used to encrypt the user's data stores in Athena. This setting does not apply to Athena
  * SQL workgroups.
@@ -20,7 +22,7 @@ final class CustomerContentEncryptionConfiguration
      */
     public function __construct(array $input)
     {
-        $this->kmsKey = $input['KmsKey'] ?? null;
+        $this->kmsKey = $input['KmsKey'] ?? $this->throwException(new InvalidArgument('Missing required field "KmsKey".'));
     }
 
     /**
@@ -37,4 +39,12 @@ public function getKmsKey(): string
     {
         return $this->kmsKey;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/DataCatalog.php b/src/Service/Athena/src/ValueObject/DataCatalog.php
index 9a7dd36b1..dfdce9319 100644
--- a/src/Service/Athena/src/ValueObject/DataCatalog.php
+++ b/src/Service/Athena/src/ValueObject/DataCatalog.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\Athena\ValueObject;
 
 use AsyncAws\Athena\Enum\DataCatalogType;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * Contains information about a data catalog in an Amazon Web Services account.
@@ -71,9 +72,9 @@ final class DataCatalog
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->description = $input['Description'] ?? null;
-        $this->type = $input['Type'] ?? null;
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
         $this->parameters = $input['Parameters'] ?? null;
     }
 
@@ -115,4 +116,12 @@ public function getType(): string
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/Database.php b/src/Service/Athena/src/ValueObject/Database.php
index 083e9cad0..b6835a527 100644
--- a/src/Service/Athena/src/ValueObject/Database.php
+++ b/src/Service/Athena/src/ValueObject/Database.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Athena\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains metadata information for a database in a data catalog.
  */
@@ -31,7 +33,7 @@ final class Database
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->description = $input['Description'] ?? null;
         $this->parameters = $input['Parameters'] ?? null;
     }
@@ -65,4 +67,12 @@ public function getParameters(): array
     {
         return $this->parameters ?? [];
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/EncryptionConfiguration.php b/src/Service/Athena/src/ValueObject/EncryptionConfiguration.php
index b8df45bf8..da56cd0d3 100644
--- a/src/Service/Athena/src/ValueObject/EncryptionConfiguration.php
+++ b/src/Service/Athena/src/ValueObject/EncryptionConfiguration.php
@@ -33,7 +33,7 @@ final class EncryptionConfiguration
      */
     public function __construct(array $input)
     {
-        $this->encryptionOption = $input['EncryptionOption'] ?? null;
+        $this->encryptionOption = $input['EncryptionOption'] ?? $this->throwException(new InvalidArgument('Missing required field "EncryptionOption".'));
         $this->kmsKey = $input['KmsKey'] ?? null;
     }
 
@@ -67,9 +67,7 @@ public function getKmsKey(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->encryptionOption) {
-            throw new InvalidArgument(sprintf('Missing parameter "EncryptionOption" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->encryptionOption;
         if (!EncryptionOption::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "EncryptionOption" for "%s". The value "%s" is not a valid "EncryptionOption".', __CLASS__, $v));
         }
@@ -80,4 +78,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/EngineConfiguration.php b/src/Service/Athena/src/ValueObject/EngineConfiguration.php
index 3f4c88ec4..8debe4182 100644
--- a/src/Service/Athena/src/ValueObject/EngineConfiguration.php
+++ b/src/Service/Athena/src/ValueObject/EngineConfiguration.php
@@ -52,7 +52,7 @@ final class EngineConfiguration
     public function __construct(array $input)
     {
         $this->coordinatorDpuSize = $input['CoordinatorDpuSize'] ?? null;
-        $this->maxConcurrentDpus = $input['MaxConcurrentDpus'] ?? null;
+        $this->maxConcurrentDpus = $input['MaxConcurrentDpus'] ?? $this->throwException(new InvalidArgument('Missing required field "MaxConcurrentDpus".'));
         $this->defaultExecutorDpuSize = $input['DefaultExecutorDpuSize'] ?? null;
         $this->additionalConfigs = $input['AdditionalConfigs'] ?? null;
         $this->sparkProperties = $input['SparkProperties'] ?? null;
@@ -112,9 +112,7 @@ public function requestBody(): array
         if (null !== $v = $this->coordinatorDpuSize) {
             $payload['CoordinatorDpuSize'] = $v;
         }
-        if (null === $v = $this->maxConcurrentDpus) {
-            throw new InvalidArgument(sprintf('Missing parameter "MaxConcurrentDpus" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->maxConcurrentDpus;
         $payload['MaxConcurrentDpus'] = $v;
         if (null !== $v = $this->defaultExecutorDpuSize) {
             $payload['DefaultExecutorDpuSize'] = $v;
@@ -142,4 +140,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/NamedQuery.php b/src/Service/Athena/src/ValueObject/NamedQuery.php
index 7804323a1..ab14dabc7 100644
--- a/src/Service/Athena/src/ValueObject/NamedQuery.php
+++ b/src/Service/Athena/src/ValueObject/NamedQuery.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Athena\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * A query, where `QueryString` contains the SQL statements that make up the query.
  */
@@ -49,10 +51,10 @@ final class NamedQuery
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->description = $input['Description'] ?? null;
-        $this->database = $input['Database'] ?? null;
-        $this->queryString = $input['QueryString'] ?? null;
+        $this->database = $input['Database'] ?? $this->throwException(new InvalidArgument('Missing required field "Database".'));
+        $this->queryString = $input['QueryString'] ?? $this->throwException(new InvalidArgument('Missing required field "QueryString".'));
         $this->namedQueryId = $input['NamedQueryId'] ?? null;
         $this->workGroup = $input['WorkGroup'] ?? null;
     }
@@ -101,4 +103,12 @@ public function getWorkGroup(): ?string
     {
         return $this->workGroup;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/ResultReuseByAgeConfiguration.php b/src/Service/Athena/src/ValueObject/ResultReuseByAgeConfiguration.php
index 9085bfc9b..b966260d6 100644
--- a/src/Service/Athena/src/ValueObject/ResultReuseByAgeConfiguration.php
+++ b/src/Service/Athena/src/ValueObject/ResultReuseByAgeConfiguration.php
@@ -28,7 +28,7 @@ final class ResultReuseByAgeConfiguration
      */
     public function __construct(array $input)
     {
-        $this->enabled = $input['Enabled'] ?? null;
+        $this->enabled = $input['Enabled'] ?? $this->throwException(new InvalidArgument('Missing required field "Enabled".'));
         $this->maxAgeInMinutes = $input['MaxAgeInMinutes'] ?? null;
     }
 
@@ -59,9 +59,7 @@ public function getMaxAgeInMinutes(): ?int
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->enabled) {
-            throw new InvalidArgument(sprintf('Missing parameter "Enabled" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->enabled;
         $payload['Enabled'] = (bool) $v;
         if (null !== $v = $this->maxAgeInMinutes) {
             $payload['MaxAgeInMinutes'] = $v;
@@ -69,4 +67,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/ResultReuseInformation.php b/src/Service/Athena/src/ValueObject/ResultReuseInformation.php
index 3057365fb..989272bd3 100644
--- a/src/Service/Athena/src/ValueObject/ResultReuseInformation.php
+++ b/src/Service/Athena/src/ValueObject/ResultReuseInformation.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Athena\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains information about whether the result of a previous query was reused.
  */
@@ -19,7 +21,7 @@ final class ResultReuseInformation
      */
     public function __construct(array $input)
     {
-        $this->reusedPreviousResult = $input['ReusedPreviousResult'] ?? null;
+        $this->reusedPreviousResult = $input['ReusedPreviousResult'] ?? $this->throwException(new InvalidArgument('Missing required field "ReusedPreviousResult".'));
     }
 
     /**
@@ -36,4 +38,12 @@ public function getReusedPreviousResult(): bool
     {
         return $this->reusedPreviousResult;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/TableMetadata.php b/src/Service/Athena/src/ValueObject/TableMetadata.php
index f1e4d6f4e..bc2c9194a 100644
--- a/src/Service/Athena/src/ValueObject/TableMetadata.php
+++ b/src/Service/Athena/src/ValueObject/TableMetadata.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Athena\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains metadata for a table.
  */
@@ -55,7 +57,7 @@ final class TableMetadata
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->createTime = $input['CreateTime'] ?? null;
         $this->lastAccessTime = $input['LastAccessTime'] ?? null;
         $this->tableType = $input['TableType'] ?? null;
@@ -123,4 +125,12 @@ public function getTableType(): ?string
     {
         return $this->tableType;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Athena/src/ValueObject/WorkGroup.php b/src/Service/Athena/src/ValueObject/WorkGroup.php
index c95831967..e93377a30 100644
--- a/src/Service/Athena/src/ValueObject/WorkGroup.php
+++ b/src/Service/Athena/src/ValueObject/WorkGroup.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\Athena\ValueObject;
 
 use AsyncAws\Athena\Enum\WorkGroupState;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * A workgroup, which contains a name, description, creation time, state, and other configuration, listed under
@@ -56,7 +57,7 @@ final class WorkGroup
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->state = $input['State'] ?? null;
         $this->configuration = isset($input['Configuration']) ? WorkGroupConfiguration::create($input['Configuration']) : null;
         $this->description = $input['Description'] ?? null;
@@ -104,4 +105,12 @@ public function getState(): ?string
     {
         return $this->state;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFormation/src/ValueObject/RollbackTrigger.php b/src/Service/CloudFormation/src/ValueObject/RollbackTrigger.php
index cbc766519..23b55e2ec 100644
--- a/src/Service/CloudFormation/src/ValueObject/RollbackTrigger.php
+++ b/src/Service/CloudFormation/src/ValueObject/RollbackTrigger.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\CloudFormation\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * A rollback trigger CloudFormation monitors during creation and updating of stacks. If any of the alarms you specify
  * goes to ALARM state during the stack operation or within the specified monitoring period afterwards, CloudFormation
@@ -33,8 +35,8 @@ final class RollbackTrigger
      */
     public function __construct(array $input)
     {
-        $this->arn = $input['Arn'] ?? null;
-        $this->type = $input['Type'] ?? null;
+        $this->arn = $input['Arn'] ?? $this->throwException(new InvalidArgument('Missing required field "Arn".'));
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
     }
 
     /**
@@ -57,4 +59,12 @@ public function getType(): string
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFormation/src/ValueObject/Stack.php b/src/Service/CloudFormation/src/ValueObject/Stack.php
index a6508d116..7874e056c 100644
--- a/src/Service/CloudFormation/src/ValueObject/Stack.php
+++ b/src/Service/CloudFormation/src/ValueObject/Stack.php
@@ -4,6 +4,7 @@
 
 use AsyncAws\CloudFormation\Enum\Capability;
 use AsyncAws\CloudFormation\Enum\StackStatus;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * The Stack data type.
@@ -174,15 +175,15 @@ final class Stack
     public function __construct(array $input)
     {
         $this->stackId = $input['StackId'] ?? null;
-        $this->stackName = $input['StackName'] ?? null;
+        $this->stackName = $input['StackName'] ?? $this->throwException(new InvalidArgument('Missing required field "StackName".'));
         $this->changeSetId = $input['ChangeSetId'] ?? null;
         $this->description = $input['Description'] ?? null;
         $this->parameters = isset($input['Parameters']) ? array_map([Parameter::class, 'create'], $input['Parameters']) : null;
-        $this->creationTime = $input['CreationTime'] ?? null;
+        $this->creationTime = $input['CreationTime'] ?? $this->throwException(new InvalidArgument('Missing required field "CreationTime".'));
         $this->deletionTime = $input['DeletionTime'] ?? null;
         $this->lastUpdatedTime = $input['LastUpdatedTime'] ?? null;
         $this->rollbackConfiguration = isset($input['RollbackConfiguration']) ? RollbackConfiguration::create($input['RollbackConfiguration']) : null;
-        $this->stackStatus = $input['StackStatus'] ?? null;
+        $this->stackStatus = $input['StackStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "StackStatus".'));
         $this->stackStatusReason = $input['StackStatusReason'] ?? null;
         $this->disableRollback = $input['DisableRollback'] ?? null;
         $this->notificationArns = $input['NotificationARNs'] ?? null;
@@ -355,4 +356,12 @@ public function getTimeoutInMinutes(): ?int
     {
         return $this->timeoutInMinutes;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFormation/src/ValueObject/StackDriftInformation.php b/src/Service/CloudFormation/src/ValueObject/StackDriftInformation.php
index 9ad4f4282..fda7a796d 100644
--- a/src/Service/CloudFormation/src/ValueObject/StackDriftInformation.php
+++ b/src/Service/CloudFormation/src/ValueObject/StackDriftInformation.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\CloudFormation\ValueObject;
 
 use AsyncAws\CloudFormation\Enum\StackDriftStatus;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * Contains information about whether the stack's actual configuration differs, or has *drifted*, from its expected
@@ -36,7 +37,7 @@ final class StackDriftInformation
      */
     public function __construct(array $input)
     {
-        $this->stackDriftStatus = $input['StackDriftStatus'] ?? null;
+        $this->stackDriftStatus = $input['StackDriftStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "StackDriftStatus".'));
         $this->lastCheckTimestamp = $input['LastCheckTimestamp'] ?? null;
     }
 
@@ -63,4 +64,12 @@ public function getStackDriftStatus(): string
     {
         return $this->stackDriftStatus;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFormation/src/ValueObject/StackEvent.php b/src/Service/CloudFormation/src/ValueObject/StackEvent.php
index 048ba966a..3aba0d011 100644
--- a/src/Service/CloudFormation/src/ValueObject/StackEvent.php
+++ b/src/Service/CloudFormation/src/ValueObject/StackEvent.php
@@ -6,6 +6,7 @@
 use AsyncAws\CloudFormation\Enum\HookInvocationPoint;
 use AsyncAws\CloudFormation\Enum\HookStatus;
 use AsyncAws\CloudFormation\Enum\ResourceStatus;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * The StackEvent data type.
@@ -129,13 +130,13 @@ final class StackEvent
      */
     public function __construct(array $input)
     {
-        $this->stackId = $input['StackId'] ?? null;
-        $this->eventId = $input['EventId'] ?? null;
-        $this->stackName = $input['StackName'] ?? null;
+        $this->stackId = $input['StackId'] ?? $this->throwException(new InvalidArgument('Missing required field "StackId".'));
+        $this->eventId = $input['EventId'] ?? $this->throwException(new InvalidArgument('Missing required field "EventId".'));
+        $this->stackName = $input['StackName'] ?? $this->throwException(new InvalidArgument('Missing required field "StackName".'));
         $this->logicalResourceId = $input['LogicalResourceId'] ?? null;
         $this->physicalResourceId = $input['PhysicalResourceId'] ?? null;
         $this->resourceType = $input['ResourceType'] ?? null;
-        $this->timestamp = $input['Timestamp'] ?? null;
+        $this->timestamp = $input['Timestamp'] ?? $this->throwException(new InvalidArgument('Missing required field "Timestamp".'));
         $this->resourceStatus = $input['ResourceStatus'] ?? null;
         $this->resourceStatusReason = $input['ResourceStatusReason'] ?? null;
         $this->resourceProperties = $input['ResourceProperties'] ?? null;
@@ -263,4 +264,12 @@ public function getTimestamp(): \DateTimeImmutable
     {
         return $this->timestamp;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFormation/src/ValueObject/Tag.php b/src/Service/CloudFormation/src/ValueObject/Tag.php
index 7cb49022e..73e07037c 100644
--- a/src/Service/CloudFormation/src/ValueObject/Tag.php
+++ b/src/Service/CloudFormation/src/ValueObject/Tag.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\CloudFormation\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The Tag type enables you to specify a key-value pair that can be used to store information about an CloudFormation
  * stack.
@@ -27,8 +29,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -51,4 +53,12 @@ public function getValue(): string
     {
         return $this->value;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFront/src/ValueObject/Invalidation.php b/src/Service/CloudFront/src/ValueObject/Invalidation.php
index 97aa77bd6..c5a83ed8c 100644
--- a/src/Service/CloudFront/src/ValueObject/Invalidation.php
+++ b/src/Service/CloudFront/src/ValueObject/Invalidation.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\CloudFront\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * An invalidation.
  */
@@ -37,10 +39,10 @@ final class Invalidation
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->status = $input['Status'] ?? null;
-        $this->createTime = $input['CreateTime'] ?? null;
-        $this->invalidationBatch = isset($input['InvalidationBatch']) ? InvalidationBatch::create($input['InvalidationBatch']) : null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->status = $input['Status'] ?? $this->throwException(new InvalidArgument('Missing required field "Status".'));
+        $this->createTime = $input['CreateTime'] ?? $this->throwException(new InvalidArgument('Missing required field "CreateTime".'));
+        $this->invalidationBatch = isset($input['InvalidationBatch']) ? InvalidationBatch::create($input['InvalidationBatch']) : $this->throwException(new InvalidArgument('Missing required field "InvalidationBatch".'));
     }
 
     /**
@@ -75,4 +77,12 @@ public function getStatus(): string
     {
         return $this->status;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFront/src/ValueObject/InvalidationBatch.php b/src/Service/CloudFront/src/ValueObject/InvalidationBatch.php
index c14f1fbf2..f32a7abf3 100644
--- a/src/Service/CloudFront/src/ValueObject/InvalidationBatch.php
+++ b/src/Service/CloudFront/src/ValueObject/InvalidationBatch.php
@@ -40,8 +40,8 @@ final class InvalidationBatch
      */
     public function __construct(array $input)
     {
-        $this->paths = isset($input['Paths']) ? Paths::create($input['Paths']) : null;
-        $this->callerReference = $input['CallerReference'] ?? null;
+        $this->paths = isset($input['Paths']) ? Paths::create($input['Paths']) : $this->throwException(new InvalidArgument('Missing required field "Paths".'));
+        $this->callerReference = $input['CallerReference'] ?? $this->throwException(new InvalidArgument('Missing required field "CallerReference".'));
     }
 
     /**
@@ -70,17 +70,21 @@ public function getPaths(): Paths
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->paths) {
-            throw new InvalidArgument(sprintf('Missing parameter "Paths" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->paths;
 
         $node->appendChild($child = $document->createElement('Paths'));
 
         $v->requestBody($child, $document);
 
-        if (null === $v = $this->callerReference) {
-            throw new InvalidArgument(sprintf('Missing parameter "CallerReference" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->callerReference;
         $node->appendChild($document->createElement('CallerReference', $v));
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudFront/src/ValueObject/Paths.php b/src/Service/CloudFront/src/ValueObject/Paths.php
index 8a757fe6d..a506b0325 100644
--- a/src/Service/CloudFront/src/ValueObject/Paths.php
+++ b/src/Service/CloudFront/src/ValueObject/Paths.php
@@ -30,7 +30,7 @@ final class Paths
      */
     public function __construct(array $input)
     {
-        $this->quantity = $input['Quantity'] ?? null;
+        $this->quantity = $input['Quantity'] ?? $this->throwException(new InvalidArgument('Missing required field "Quantity".'));
         $this->items = $input['Items'] ?? null;
     }
 
@@ -63,9 +63,7 @@ public function getQuantity(): int
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->quantity) {
-            throw new InvalidArgument(sprintf('Missing parameter "Quantity" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->quantity;
         $node->appendChild($document->createElement('Quantity', (string) $v));
         if (null !== $v = $this->items) {
             $node->appendChild($nodeList = $document->createElement('Items'));
@@ -74,4 +72,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             }
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatch/src/ValueObject/Dimension.php b/src/Service/CloudWatch/src/ValueObject/Dimension.php
index 51545e803..08c96a026 100644
--- a/src/Service/CloudWatch/src/ValueObject/Dimension.php
+++ b/src/Service/CloudWatch/src/ValueObject/Dimension.php
@@ -35,8 +35,8 @@ final class Dimension
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -66,15 +66,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatch/src/ValueObject/DimensionFilter.php b/src/Service/CloudWatch/src/ValueObject/DimensionFilter.php
index cc2c30f0b..5c7942921 100644
--- a/src/Service/CloudWatch/src/ValueObject/DimensionFilter.php
+++ b/src/Service/CloudWatch/src/ValueObject/DimensionFilter.php
@@ -27,7 +27,7 @@ final class DimensionFilter
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->value = $input['Value'] ?? null;
     }
 
@@ -58,9 +58,7 @@ public function getValue(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
         if (null !== $v = $this->value) {
             $payload['Value'] = $v;
@@ -68,4 +66,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatch/src/ValueObject/MetricDataQuery.php b/src/Service/CloudWatch/src/ValueObject/MetricDataQuery.php
index 106acafab..1705bc1de 100644
--- a/src/Service/CloudWatch/src/ValueObject/MetricDataQuery.php
+++ b/src/Service/CloudWatch/src/ValueObject/MetricDataQuery.php
@@ -117,7 +117,7 @@ final class MetricDataQuery
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
         $this->metricStat = isset($input['MetricStat']) ? MetricStat::create($input['MetricStat']) : null;
         $this->expression = $input['Expression'] ?? null;
         $this->label = $input['Label'] ?? null;
@@ -183,9 +183,7 @@ public function getReturnData(): ?bool
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->id) {
-            throw new InvalidArgument(sprintf('Missing parameter "Id" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->id;
         $payload['Id'] = $v;
         if (null !== $v = $this->metricStat) {
             foreach ($v->requestBody() as $bodyKey => $bodyValue) {
@@ -210,4 +208,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatch/src/ValueObject/MetricDatum.php b/src/Service/CloudWatch/src/ValueObject/MetricDatum.php
index 5f9d93883..0d5076868 100644
--- a/src/Service/CloudWatch/src/ValueObject/MetricDatum.php
+++ b/src/Service/CloudWatch/src/ValueObject/MetricDatum.php
@@ -96,7 +96,7 @@ final class MetricDatum
      */
     public function __construct(array $input)
     {
-        $this->metricName = $input['MetricName'] ?? null;
+        $this->metricName = $input['MetricName'] ?? $this->throwException(new InvalidArgument('Missing required field "MetricName".'));
         $this->dimensions = isset($input['Dimensions']) ? array_map([Dimension::class, 'create'], $input['Dimensions']) : null;
         $this->timestamp = $input['Timestamp'] ?? null;
         $this->value = $input['Value'] ?? null;
@@ -188,9 +188,7 @@ public function getValues(): array
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->metricName) {
-            throw new InvalidArgument(sprintf('Missing parameter "MetricName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->metricName;
         $payload['MetricName'] = $v;
         if (null !== $v = $this->dimensions) {
             $index = 0;
@@ -238,4 +236,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatch/src/ValueObject/MetricStat.php b/src/Service/CloudWatch/src/ValueObject/MetricStat.php
index 88558532f..412211358 100644
--- a/src/Service/CloudWatch/src/ValueObject/MetricStat.php
+++ b/src/Service/CloudWatch/src/ValueObject/MetricStat.php
@@ -55,9 +55,9 @@ final class MetricStat
      */
     public function __construct(array $input)
     {
-        $this->metric = isset($input['Metric']) ? Metric::create($input['Metric']) : null;
-        $this->period = $input['Period'] ?? null;
-        $this->stat = $input['Stat'] ?? null;
+        $this->metric = isset($input['Metric']) ? Metric::create($input['Metric']) : $this->throwException(new InvalidArgument('Missing required field "Metric".'));
+        $this->period = $input['Period'] ?? $this->throwException(new InvalidArgument('Missing required field "Period".'));
+        $this->stat = $input['Stat'] ?? $this->throwException(new InvalidArgument('Missing required field "Stat".'));
         $this->unit = $input['Unit'] ?? null;
     }
 
@@ -103,20 +103,14 @@ public function getUnit(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->metric) {
-            throw new InvalidArgument(sprintf('Missing parameter "Metric" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->metric;
         foreach ($v->requestBody() as $bodyKey => $bodyValue) {
             $payload["Metric.$bodyKey"] = $bodyValue;
         }
 
-        if (null === $v = $this->period) {
-            throw new InvalidArgument(sprintf('Missing parameter "Period" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->period;
         $payload['Period'] = $v;
-        if (null === $v = $this->stat) {
-            throw new InvalidArgument(sprintf('Missing parameter "Stat" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->stat;
         $payload['Stat'] = $v;
         if (null !== $v = $this->unit) {
             if (!StandardUnit::exists($v)) {
@@ -127,4 +121,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatch/src/ValueObject/StatisticSet.php b/src/Service/CloudWatch/src/ValueObject/StatisticSet.php
index 2f4f812b8..4d3bcc38a 100644
--- a/src/Service/CloudWatch/src/ValueObject/StatisticSet.php
+++ b/src/Service/CloudWatch/src/ValueObject/StatisticSet.php
@@ -39,10 +39,10 @@ final class StatisticSet
      */
     public function __construct(array $input)
     {
-        $this->sampleCount = $input['SampleCount'] ?? null;
-        $this->sum = $input['Sum'] ?? null;
-        $this->minimum = $input['Minimum'] ?? null;
-        $this->maximum = $input['Maximum'] ?? null;
+        $this->sampleCount = $input['SampleCount'] ?? $this->throwException(new InvalidArgument('Missing required field "SampleCount".'));
+        $this->sum = $input['Sum'] ?? $this->throwException(new InvalidArgument('Missing required field "Sum".'));
+        $this->minimum = $input['Minimum'] ?? $this->throwException(new InvalidArgument('Missing required field "Minimum".'));
+        $this->maximum = $input['Maximum'] ?? $this->throwException(new InvalidArgument('Missing required field "Maximum".'));
     }
 
     /**
@@ -84,23 +84,23 @@ public function getSum(): float
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->sampleCount) {
-            throw new InvalidArgument(sprintf('Missing parameter "SampleCount" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->sampleCount;
         $payload['SampleCount'] = $v;
-        if (null === $v = $this->sum) {
-            throw new InvalidArgument(sprintf('Missing parameter "Sum" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->sum;
         $payload['Sum'] = $v;
-        if (null === $v = $this->minimum) {
-            throw new InvalidArgument(sprintf('Missing parameter "Minimum" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->minimum;
         $payload['Minimum'] = $v;
-        if (null === $v = $this->maximum) {
-            throw new InvalidArgument(sprintf('Missing parameter "Maximum" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->maximum;
         $payload['Maximum'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CloudWatchLogs/src/ValueObject/InputLogEvent.php b/src/Service/CloudWatchLogs/src/ValueObject/InputLogEvent.php
index 08541368e..b2733c501 100644
--- a/src/Service/CloudWatchLogs/src/ValueObject/InputLogEvent.php
+++ b/src/Service/CloudWatchLogs/src/ValueObject/InputLogEvent.php
@@ -28,8 +28,8 @@ final class InputLogEvent
      */
     public function __construct(array $input)
     {
-        $this->timestamp = $input['timestamp'] ?? null;
-        $this->message = $input['message'] ?? null;
+        $this->timestamp = $input['timestamp'] ?? $this->throwException(new InvalidArgument('Missing required field "timestamp".'));
+        $this->message = $input['message'] ?? $this->throwException(new InvalidArgument('Missing required field "message".'));
     }
 
     /**
@@ -59,15 +59,19 @@ public function getTimestamp(): int
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->timestamp) {
-            throw new InvalidArgument(sprintf('Missing parameter "timestamp" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->timestamp;
         $payload['timestamp'] = $v;
-        if (null === $v = $this->message) {
-            throw new InvalidArgument(sprintf('Missing parameter "message" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->message;
         $payload['message'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/CloudWatchLogsConfig.php b/src/Service/CodeBuild/src/ValueObject/CloudWatchLogsConfig.php
index feacbdebe..5774c94a6 100644
--- a/src/Service/CodeBuild/src/ValueObject/CloudWatchLogsConfig.php
+++ b/src/Service/CodeBuild/src/ValueObject/CloudWatchLogsConfig.php
@@ -43,7 +43,7 @@ final class CloudWatchLogsConfig
      */
     public function __construct(array $input)
     {
-        $this->status = $input['status'] ?? null;
+        $this->status = $input['status'] ?? $this->throwException(new InvalidArgument('Missing required field "status".'));
         $this->groupName = $input['groupName'] ?? null;
         $this->streamName = $input['streamName'] ?? null;
     }
@@ -84,9 +84,7 @@ public function getStreamName(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->status) {
-            throw new InvalidArgument(sprintf('Missing parameter "status" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->status;
         if (!LogsConfigStatusType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "status" for "%s". The value "%s" is not a valid "LogsConfigStatusType".', __CLASS__, $v));
         }
@@ -100,4 +98,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/EnvironmentVariable.php b/src/Service/CodeBuild/src/ValueObject/EnvironmentVariable.php
index 54c1828c4..2be342f62 100644
--- a/src/Service/CodeBuild/src/ValueObject/EnvironmentVariable.php
+++ b/src/Service/CodeBuild/src/ValueObject/EnvironmentVariable.php
@@ -48,8 +48,8 @@ final class EnvironmentVariable
      */
     public function __construct(array $input)
     {
-        $this->name = $input['name'] ?? null;
-        $this->value = $input['value'] ?? null;
+        $this->name = $input['name'] ?? $this->throwException(new InvalidArgument('Missing required field "name".'));
+        $this->value = $input['value'] ?? $this->throwException(new InvalidArgument('Missing required field "value".'));
         $this->type = $input['type'] ?? null;
     }
 
@@ -89,13 +89,9 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['name'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['value'] = $v;
         if (null !== $v = $this->type) {
             if (!EnvironmentVariableType::exists($v)) {
@@ -106,4 +102,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/GitSubmodulesConfig.php b/src/Service/CodeBuild/src/ValueObject/GitSubmodulesConfig.php
index 9d382104b..f43f49fc4 100644
--- a/src/Service/CodeBuild/src/ValueObject/GitSubmodulesConfig.php
+++ b/src/Service/CodeBuild/src/ValueObject/GitSubmodulesConfig.php
@@ -21,7 +21,7 @@ final class GitSubmodulesConfig
      */
     public function __construct(array $input)
     {
-        $this->fetchSubmodules = $input['fetchSubmodules'] ?? null;
+        $this->fetchSubmodules = $input['fetchSubmodules'] ?? $this->throwException(new InvalidArgument('Missing required field "fetchSubmodules".'));
     }
 
     /**
@@ -45,11 +45,17 @@ public function getFetchSubmodules(): bool
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->fetchSubmodules) {
-            throw new InvalidArgument(sprintf('Missing parameter "fetchSubmodules" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->fetchSubmodules;
         $payload['fetchSubmodules'] = (bool) $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/ProjectArtifacts.php b/src/Service/CodeBuild/src/ValueObject/ProjectArtifacts.php
index 32258ffca..6cb6880e0 100644
--- a/src/Service/CodeBuild/src/ValueObject/ProjectArtifacts.php
+++ b/src/Service/CodeBuild/src/ValueObject/ProjectArtifacts.php
@@ -136,7 +136,7 @@ final class ProjectArtifacts
      */
     public function __construct(array $input)
     {
-        $this->type = $input['type'] ?? null;
+        $this->type = $input['type'] ?? $this->throwException(new InvalidArgument('Missing required field "type".'));
         $this->location = $input['location'] ?? null;
         $this->path = $input['path'] ?? null;
         $this->namespaceType = $input['namespaceType'] ?? null;
@@ -235,9 +235,7 @@ public function getType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!ArtifactsType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "type" for "%s". The value "%s" is not a valid "ArtifactsType".', __CLASS__, $v));
         }
@@ -281,4 +279,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/ProjectCache.php b/src/Service/CodeBuild/src/ValueObject/ProjectCache.php
index 910e35670..b88de7aa7 100644
--- a/src/Service/CodeBuild/src/ValueObject/ProjectCache.php
+++ b/src/Service/CodeBuild/src/ValueObject/ProjectCache.php
@@ -71,7 +71,7 @@ final class ProjectCache
      */
     public function __construct(array $input)
     {
-        $this->type = $input['type'] ?? null;
+        $this->type = $input['type'] ?? $this->throwException(new InvalidArgument('Missing required field "type".'));
         $this->location = $input['location'] ?? null;
         $this->modes = $input['modes'] ?? null;
     }
@@ -115,9 +115,7 @@ public function getType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!CacheType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "type" for "%s". The value "%s" is not a valid "CacheType".', __CLASS__, $v));
         }
@@ -139,4 +137,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/ProjectEnvironment.php b/src/Service/CodeBuild/src/ValueObject/ProjectEnvironment.php
index a98b97f03..daaaf9afd 100644
--- a/src/Service/CodeBuild/src/ValueObject/ProjectEnvironment.php
+++ b/src/Service/CodeBuild/src/ValueObject/ProjectEnvironment.php
@@ -5,6 +5,7 @@
 use AsyncAws\CodeBuild\Enum\ComputeType;
 use AsyncAws\CodeBuild\Enum\EnvironmentType;
 use AsyncAws\CodeBuild\Enum\ImagePullCredentialsType;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * Information about the build environment of the build project.
@@ -141,9 +142,9 @@ final class ProjectEnvironment
      */
     public function __construct(array $input)
     {
-        $this->type = $input['type'] ?? null;
-        $this->image = $input['image'] ?? null;
-        $this->computeType = $input['computeType'] ?? null;
+        $this->type = $input['type'] ?? $this->throwException(new InvalidArgument('Missing required field "type".'));
+        $this->image = $input['image'] ?? $this->throwException(new InvalidArgument('Missing required field "image".'));
+        $this->computeType = $input['computeType'] ?? $this->throwException(new InvalidArgument('Missing required field "computeType".'));
         $this->environmentVariables = isset($input['environmentVariables']) ? array_map([EnvironmentVariable::class, 'create'], $input['environmentVariables']) : null;
         $this->privilegedMode = $input['privilegedMode'] ?? null;
         $this->certificate = $input['certificate'] ?? null;
@@ -219,4 +220,12 @@ public function getType(): string
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/ProjectSource.php b/src/Service/CodeBuild/src/ValueObject/ProjectSource.php
index ad642bfee..bb3945efe 100644
--- a/src/Service/CodeBuild/src/ValueObject/ProjectSource.php
+++ b/src/Service/CodeBuild/src/ValueObject/ProjectSource.php
@@ -140,7 +140,7 @@ final class ProjectSource
      */
     public function __construct(array $input)
     {
-        $this->type = $input['type'] ?? null;
+        $this->type = $input['type'] ?? $this->throwException(new InvalidArgument('Missing required field "type".'));
         $this->location = $input['location'] ?? null;
         $this->gitCloneDepth = $input['gitCloneDepth'] ?? null;
         $this->gitSubmodulesConfig = isset($input['gitSubmodulesConfig']) ? GitSubmodulesConfig::create($input['gitSubmodulesConfig']) : null;
@@ -230,9 +230,7 @@ public function getType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!SourceType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "type" for "%s". The value "%s" is not a valid "SourceType".', __CLASS__, $v));
         }
@@ -267,4 +265,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/ProjectSourceVersion.php b/src/Service/CodeBuild/src/ValueObject/ProjectSourceVersion.php
index 73963c556..7de272a93 100644
--- a/src/Service/CodeBuild/src/ValueObject/ProjectSourceVersion.php
+++ b/src/Service/CodeBuild/src/ValueObject/ProjectSourceVersion.php
@@ -42,8 +42,8 @@ final class ProjectSourceVersion
      */
     public function __construct(array $input)
     {
-        $this->sourceIdentifier = $input['sourceIdentifier'] ?? null;
-        $this->sourceVersion = $input['sourceVersion'] ?? null;
+        $this->sourceIdentifier = $input['sourceIdentifier'] ?? $this->throwException(new InvalidArgument('Missing required field "sourceIdentifier".'));
+        $this->sourceVersion = $input['sourceVersion'] ?? $this->throwException(new InvalidArgument('Missing required field "sourceVersion".'));
     }
 
     /**
@@ -73,15 +73,19 @@ public function getSourceVersion(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->sourceIdentifier) {
-            throw new InvalidArgument(sprintf('Missing parameter "sourceIdentifier" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->sourceIdentifier;
         $payload['sourceIdentifier'] = $v;
-        if (null === $v = $this->sourceVersion) {
-            throw new InvalidArgument(sprintf('Missing parameter "sourceVersion" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->sourceVersion;
         $payload['sourceVersion'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/RegistryCredential.php b/src/Service/CodeBuild/src/ValueObject/RegistryCredential.php
index 5dc843e10..74f32cc9c 100644
--- a/src/Service/CodeBuild/src/ValueObject/RegistryCredential.php
+++ b/src/Service/CodeBuild/src/ValueObject/RegistryCredential.php
@@ -38,8 +38,8 @@ final class RegistryCredential
      */
     public function __construct(array $input)
     {
-        $this->credential = $input['credential'] ?? null;
-        $this->credentialProvider = $input['credentialProvider'] ?? null;
+        $this->credential = $input['credential'] ?? $this->throwException(new InvalidArgument('Missing required field "credential".'));
+        $this->credentialProvider = $input['credentialProvider'] ?? $this->throwException(new InvalidArgument('Missing required field "credentialProvider".'));
     }
 
     /**
@@ -72,13 +72,9 @@ public function getCredentialProvider(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->credential) {
-            throw new InvalidArgument(sprintf('Missing parameter "credential" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->credential;
         $payload['credential'] = $v;
-        if (null === $v = $this->credentialProvider) {
-            throw new InvalidArgument(sprintf('Missing parameter "credentialProvider" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->credentialProvider;
         if (!CredentialProviderType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "credentialProvider" for "%s". The value "%s" is not a valid "CredentialProviderType".', __CLASS__, $v));
         }
@@ -86,4 +82,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/S3LogsConfig.php b/src/Service/CodeBuild/src/ValueObject/S3LogsConfig.php
index cd1ca9f61..8d849a800 100644
--- a/src/Service/CodeBuild/src/ValueObject/S3LogsConfig.php
+++ b/src/Service/CodeBuild/src/ValueObject/S3LogsConfig.php
@@ -42,7 +42,7 @@ final class S3LogsConfig
      */
     public function __construct(array $input)
     {
-        $this->status = $input['status'] ?? null;
+        $this->status = $input['status'] ?? $this->throwException(new InvalidArgument('Missing required field "status".'));
         $this->location = $input['location'] ?? null;
         $this->encryptionDisabled = $input['encryptionDisabled'] ?? null;
         $this->bucketOwnerAccess = $input['bucketOwnerAccess'] ?? null;
@@ -93,9 +93,7 @@ public function getStatus(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->status) {
-            throw new InvalidArgument(sprintf('Missing parameter "status" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->status;
         if (!LogsConfigStatusType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "status" for "%s". The value "%s" is not a valid "LogsConfigStatusType".', __CLASS__, $v));
         }
@@ -115,4 +113,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeBuild/src/ValueObject/SourceAuth.php b/src/Service/CodeBuild/src/ValueObject/SourceAuth.php
index dda1141f6..0c722b7d3 100644
--- a/src/Service/CodeBuild/src/ValueObject/SourceAuth.php
+++ b/src/Service/CodeBuild/src/ValueObject/SourceAuth.php
@@ -32,7 +32,7 @@ final class SourceAuth
      */
     public function __construct(array $input)
     {
-        $this->type = $input['type'] ?? null;
+        $this->type = $input['type'] ?? $this->throwException(new InvalidArgument('Missing required field "type".'));
         $this->resource = $input['resource'] ?? null;
     }
 
@@ -66,9 +66,7 @@ public function getType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!SourceAuthType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "type" for "%s". The value "%s" is not a valid "SourceAuthType".', __CLASS__, $v));
         }
@@ -79,4 +77,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CodeCommit/src/ValueObject/RepositoryTrigger.php b/src/Service/CodeCommit/src/ValueObject/RepositoryTrigger.php
index 6f193b258..47dddbe69 100644
--- a/src/Service/CodeCommit/src/ValueObject/RepositoryTrigger.php
+++ b/src/Service/CodeCommit/src/ValueObject/RepositoryTrigger.php
@@ -52,11 +52,11 @@ final class RepositoryTrigger
      */
     public function __construct(array $input)
     {
-        $this->name = $input['name'] ?? null;
-        $this->destinationArn = $input['destinationArn'] ?? null;
+        $this->name = $input['name'] ?? $this->throwException(new InvalidArgument('Missing required field "name".'));
+        $this->destinationArn = $input['destinationArn'] ?? $this->throwException(new InvalidArgument('Missing required field "destinationArn".'));
         $this->customData = $input['customData'] ?? null;
         $this->branches = $input['branches'] ?? null;
-        $this->events = $input['events'] ?? null;
+        $this->events = $input['events'] ?? $this->throwException(new InvalidArgument('Missing required field "events".'));
     }
 
     /**
@@ -96,7 +96,7 @@ public function getDestinationArn(): string
      */
     public function getEvents(): array
     {
-        return $this->events ?? [];
+        return $this->events;
     }
 
     public function getName(): string
@@ -110,13 +110,9 @@ public function getName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['name'] = $v;
-        if (null === $v = $this->destinationArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "destinationArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->destinationArn;
         $payload['destinationArn'] = $v;
         if (null !== $v = $this->customData) {
             $payload['customData'] = $v;
@@ -129,9 +125,7 @@ public function requestBody(): array
                 $payload['branches'][$index] = $listValue;
             }
         }
-        if (null === $v = $this->events) {
-            throw new InvalidArgument(sprintf('Missing parameter "events" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->events;
 
         $index = -1;
         $payload['events'] = [];
@@ -145,4 +139,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CognitoIdentityProvider/src/ValueObject/AttributeType.php b/src/Service/CognitoIdentityProvider/src/ValueObject/AttributeType.php
index bfa92fa99..beb7d6dc0 100644
--- a/src/Service/CognitoIdentityProvider/src/ValueObject/AttributeType.php
+++ b/src/Service/CognitoIdentityProvider/src/ValueObject/AttributeType.php
@@ -27,7 +27,7 @@ final class AttributeType
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
         $this->value = $input['Value'] ?? null;
     }
 
@@ -58,9 +58,7 @@ public function getValue(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
         if (null !== $v = $this->value) {
             $payload['Value'] = $v;
@@ -68,4 +66,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/CognitoIdentityProvider/src/ValueObject/ContextDataType.php b/src/Service/CognitoIdentityProvider/src/ValueObject/ContextDataType.php
index c76e8649c..b2fa37608 100644
--- a/src/Service/CognitoIdentityProvider/src/ValueObject/ContextDataType.php
+++ b/src/Service/CognitoIdentityProvider/src/ValueObject/ContextDataType.php
@@ -48,10 +48,10 @@ final class ContextDataType
      */
     public function __construct(array $input)
     {
-        $this->ipAddress = $input['IpAddress'] ?? null;
-        $this->serverName = $input['ServerName'] ?? null;
-        $this->serverPath = $input['ServerPath'] ?? null;
-        $this->httpHeaders = isset($input['HttpHeaders']) ? array_map([HttpHeader::class, 'create'], $input['HttpHeaders']) : null;
+        $this->ipAddress = $input['IpAddress'] ?? $this->throwException(new InvalidArgument('Missing required field "IpAddress".'));
+        $this->serverName = $input['ServerName'] ?? $this->throwException(new InvalidArgument('Missing required field "ServerName".'));
+        $this->serverPath = $input['ServerPath'] ?? $this->throwException(new InvalidArgument('Missing required field "ServerPath".'));
+        $this->httpHeaders = isset($input['HttpHeaders']) ? array_map([HttpHeader::class, 'create'], $input['HttpHeaders']) : $this->throwException(new InvalidArgument('Missing required field "HttpHeaders".'));
         $this->encodedData = $input['EncodedData'] ?? null;
     }
 
@@ -79,7 +79,7 @@ public function getEncodedData(): ?string
      */
     public function getHttpHeaders(): array
     {
-        return $this->httpHeaders ?? [];
+        return $this->httpHeaders;
     }
 
     public function getIpAddress(): string
@@ -103,21 +103,13 @@ public function getServerPath(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->ipAddress) {
-            throw new InvalidArgument(sprintf('Missing parameter "IpAddress" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->ipAddress;
         $payload['IpAddress'] = $v;
-        if (null === $v = $this->serverName) {
-            throw new InvalidArgument(sprintf('Missing parameter "ServerName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->serverName;
         $payload['ServerName'] = $v;
-        if (null === $v = $this->serverPath) {
-            throw new InvalidArgument(sprintf('Missing parameter "ServerPath" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->serverPath;
         $payload['ServerPath'] = $v;
-        if (null === $v = $this->httpHeaders) {
-            throw new InvalidArgument(sprintf('Missing parameter "HttpHeaders" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->httpHeaders;
 
         $index = -1;
         $payload['HttpHeaders'] = [];
@@ -132,4 +124,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/AttributeDefinition.php b/src/Service/DynamoDb/src/ValueObject/AttributeDefinition.php
index 00f20bf24..fe532378e 100644
--- a/src/Service/DynamoDb/src/ValueObject/AttributeDefinition.php
+++ b/src/Service/DynamoDb/src/ValueObject/AttributeDefinition.php
@@ -32,8 +32,8 @@ final class AttributeDefinition
      */
     public function __construct(array $input)
     {
-        $this->attributeName = $input['AttributeName'] ?? null;
-        $this->attributeType = $input['AttributeType'] ?? null;
+        $this->attributeName = $input['AttributeName'] ?? $this->throwException(new InvalidArgument('Missing required field "AttributeName".'));
+        $this->attributeType = $input['AttributeType'] ?? $this->throwException(new InvalidArgument('Missing required field "AttributeType".'));
     }
 
     /**
@@ -66,13 +66,9 @@ public function getAttributeType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->attributeName) {
-            throw new InvalidArgument(sprintf('Missing parameter "AttributeName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->attributeName;
         $payload['AttributeName'] = $v;
-        if (null === $v = $this->attributeType) {
-            throw new InvalidArgument(sprintf('Missing parameter "AttributeType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->attributeType;
         if (!ScalarAttributeType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "AttributeType" for "%s". The value "%s" is not a valid "ScalarAttributeType".', __CLASS__, $v));
         }
@@ -80,4 +76,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/Condition.php b/src/Service/DynamoDb/src/ValueObject/Condition.php
index 876868c69..974b729bb 100644
--- a/src/Service/DynamoDb/src/ValueObject/Condition.php
+++ b/src/Service/DynamoDb/src/ValueObject/Condition.php
@@ -146,7 +146,7 @@ final class Condition
     public function __construct(array $input)
     {
         $this->attributeValueList = isset($input['AttributeValueList']) ? array_map([AttributeValue::class, 'create'], $input['AttributeValueList']) : null;
-        $this->comparisonOperator = $input['ComparisonOperator'] ?? null;
+        $this->comparisonOperator = $input['ComparisonOperator'] ?? $this->throwException(new InvalidArgument('Missing required field "ComparisonOperator".'));
     }
 
     /**
@@ -190,9 +190,7 @@ public function requestBody(): array
                 $payload['AttributeValueList'][$index] = $listValue->requestBody();
             }
         }
-        if (null === $v = $this->comparisonOperator) {
-            throw new InvalidArgument(sprintf('Missing parameter "ComparisonOperator" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->comparisonOperator;
         if (!ComparisonOperator::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "ComparisonOperator" for "%s". The value "%s" is not a valid "ComparisonOperator".', __CLASS__, $v));
         }
@@ -200,4 +198,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/ConditionCheck.php b/src/Service/DynamoDb/src/ValueObject/ConditionCheck.php
index c1a762942..57f86f044 100644
--- a/src/Service/DynamoDb/src/ValueObject/ConditionCheck.php
+++ b/src/Service/DynamoDb/src/ValueObject/ConditionCheck.php
@@ -63,9 +63,9 @@ final class ConditionCheck
      */
     public function __construct(array $input)
     {
-        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : null;
-        $this->tableName = $input['TableName'] ?? null;
-        $this->conditionExpression = $input['ConditionExpression'] ?? null;
+        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->tableName = $input['TableName'] ?? $this->throwException(new InvalidArgument('Missing required field "TableName".'));
+        $this->conditionExpression = $input['ConditionExpression'] ?? $this->throwException(new InvalidArgument('Missing required field "ConditionExpression".'));
         $this->expressionAttributeNames = $input['ExpressionAttributeNames'] ?? null;
         $this->expressionAttributeValues = isset($input['ExpressionAttributeValues']) ? array_map([AttributeValue::class, 'create'], $input['ExpressionAttributeValues']) : null;
         $this->returnValuesOnConditionCheckFailure = $input['ReturnValuesOnConditionCheckFailure'] ?? null;
@@ -112,7 +112,7 @@ public function getExpressionAttributeValues(): array
      */
     public function getKey(): array
     {
-        return $this->key ?? [];
+        return $this->key;
     }
 
     /**
@@ -134,9 +134,7 @@ public function getTableName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
 
         if (empty($v)) {
             $payload['Key'] = new \stdClass();
@@ -146,13 +144,9 @@ public function requestBody(): array
                 $payload['Key'][$name] = $mv->requestBody();
             }
         }
-        if (null === $v = $this->tableName) {
-            throw new InvalidArgument(sprintf('Missing parameter "TableName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tableName;
         $payload['TableName'] = $v;
-        if (null === $v = $this->conditionExpression) {
-            throw new InvalidArgument(sprintf('Missing parameter "ConditionExpression" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->conditionExpression;
         $payload['ConditionExpression'] = $v;
         if (null !== $v = $this->expressionAttributeNames) {
             if (empty($v)) {
@@ -183,4 +177,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/CreateGlobalSecondaryIndexAction.php b/src/Service/DynamoDb/src/ValueObject/CreateGlobalSecondaryIndexAction.php
index 99a5f0d39..24c9c3678 100644
--- a/src/Service/DynamoDb/src/ValueObject/CreateGlobalSecondaryIndexAction.php
+++ b/src/Service/DynamoDb/src/ValueObject/CreateGlobalSecondaryIndexAction.php
@@ -45,9 +45,9 @@ final class CreateGlobalSecondaryIndexAction
      */
     public function __construct(array $input)
     {
-        $this->indexName = $input['IndexName'] ?? null;
-        $this->keySchema = isset($input['KeySchema']) ? array_map([KeySchemaElement::class, 'create'], $input['KeySchema']) : null;
-        $this->projection = isset($input['Projection']) ? Projection::create($input['Projection']) : null;
+        $this->indexName = $input['IndexName'] ?? $this->throwException(new InvalidArgument('Missing required field "IndexName".'));
+        $this->keySchema = isset($input['KeySchema']) ? array_map([KeySchemaElement::class, 'create'], $input['KeySchema']) : $this->throwException(new InvalidArgument('Missing required field "KeySchema".'));
+        $this->projection = isset($input['Projection']) ? Projection::create($input['Projection']) : $this->throwException(new InvalidArgument('Missing required field "Projection".'));
         $this->provisionedThroughput = isset($input['ProvisionedThroughput']) ? ProvisionedThroughput::create($input['ProvisionedThroughput']) : null;
     }
 
@@ -74,7 +74,7 @@ public function getIndexName(): string
      */
     public function getKeySchema(): array
     {
-        return $this->keySchema ?? [];
+        return $this->keySchema;
     }
 
     public function getProjection(): Projection
@@ -93,13 +93,9 @@ public function getProvisionedThroughput(): ?ProvisionedThroughput
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->indexName) {
-            throw new InvalidArgument(sprintf('Missing parameter "IndexName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->indexName;
         $payload['IndexName'] = $v;
-        if (null === $v = $this->keySchema) {
-            throw new InvalidArgument(sprintf('Missing parameter "KeySchema" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->keySchema;
 
         $index = -1;
         $payload['KeySchema'] = [];
@@ -108,9 +104,7 @@ public function requestBody(): array
             $payload['KeySchema'][$index] = $listValue->requestBody();
         }
 
-        if (null === $v = $this->projection) {
-            throw new InvalidArgument(sprintf('Missing parameter "Projection" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->projection;
         $payload['Projection'] = $v->requestBody();
         if (null !== $v = $this->provisionedThroughput) {
             $payload['ProvisionedThroughput'] = $v->requestBody();
@@ -118,4 +112,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/CreateReplicationGroupMemberAction.php b/src/Service/DynamoDb/src/ValueObject/CreateReplicationGroupMemberAction.php
index ac013fce7..65bda4039 100644
--- a/src/Service/DynamoDb/src/ValueObject/CreateReplicationGroupMemberAction.php
+++ b/src/Service/DynamoDb/src/ValueObject/CreateReplicationGroupMemberAction.php
@@ -48,7 +48,7 @@ final class CreateReplicationGroupMemberAction
      */
     public function __construct(array $input)
     {
-        $this->regionName = $input['RegionName'] ?? null;
+        $this->regionName = $input['RegionName'] ?? $this->throwException(new InvalidArgument('Missing required field "RegionName".'));
         $this->kmsMasterKeyId = $input['KMSMasterKeyId'] ?? null;
         $this->provisionedThroughputOverride = isset($input['ProvisionedThroughputOverride']) ? ProvisionedThroughputOverride::create($input['ProvisionedThroughputOverride']) : null;
         $this->globalSecondaryIndexes = isset($input['GlobalSecondaryIndexes']) ? array_map([ReplicaGlobalSecondaryIndex::class, 'create'], $input['GlobalSecondaryIndexes']) : null;
@@ -106,9 +106,7 @@ public function getTableClassOverride(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->regionName) {
-            throw new InvalidArgument(sprintf('Missing parameter "RegionName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->regionName;
         $payload['RegionName'] = $v;
         if (null !== $v = $this->kmsMasterKeyId) {
             $payload['KMSMasterKeyId'] = $v;
@@ -133,4 +131,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/Delete.php b/src/Service/DynamoDb/src/ValueObject/Delete.php
index 230da3a9b..f6ad74a25 100644
--- a/src/Service/DynamoDb/src/ValueObject/Delete.php
+++ b/src/Service/DynamoDb/src/ValueObject/Delete.php
@@ -53,8 +53,8 @@ final class Delete
      */
     public function __construct(array $input)
     {
-        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : null;
-        $this->tableName = $input['TableName'] ?? null;
+        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->tableName = $input['TableName'] ?? $this->throwException(new InvalidArgument('Missing required field "TableName".'));
         $this->conditionExpression = $input['ConditionExpression'] ?? null;
         $this->expressionAttributeNames = $input['ExpressionAttributeNames'] ?? null;
         $this->expressionAttributeValues = isset($input['ExpressionAttributeValues']) ? array_map([AttributeValue::class, 'create'], $input['ExpressionAttributeValues']) : null;
@@ -102,7 +102,7 @@ public function getExpressionAttributeValues(): array
      */
     public function getKey(): array
     {
-        return $this->key ?? [];
+        return $this->key;
     }
 
     /**
@@ -124,9 +124,7 @@ public function getTableName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
 
         if (empty($v)) {
             $payload['Key'] = new \stdClass();
@@ -136,9 +134,7 @@ public function requestBody(): array
                 $payload['Key'][$name] = $mv->requestBody();
             }
         }
-        if (null === $v = $this->tableName) {
-            throw new InvalidArgument(sprintf('Missing parameter "TableName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tableName;
         $payload['TableName'] = $v;
         if (null !== $v = $this->conditionExpression) {
             $payload['ConditionExpression'] = $v;
@@ -172,4 +168,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/DeleteGlobalSecondaryIndexAction.php b/src/Service/DynamoDb/src/ValueObject/DeleteGlobalSecondaryIndexAction.php
index 526a3eb8b..65c879650 100644
--- a/src/Service/DynamoDb/src/ValueObject/DeleteGlobalSecondaryIndexAction.php
+++ b/src/Service/DynamoDb/src/ValueObject/DeleteGlobalSecondaryIndexAction.php
@@ -21,7 +21,7 @@ final class DeleteGlobalSecondaryIndexAction
      */
     public function __construct(array $input)
     {
-        $this->indexName = $input['IndexName'] ?? null;
+        $this->indexName = $input['IndexName'] ?? $this->throwException(new InvalidArgument('Missing required field "IndexName".'));
     }
 
     /**
@@ -45,11 +45,17 @@ public function getIndexName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->indexName) {
-            throw new InvalidArgument(sprintf('Missing parameter "IndexName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->indexName;
         $payload['IndexName'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/DeleteReplicationGroupMemberAction.php b/src/Service/DynamoDb/src/ValueObject/DeleteReplicationGroupMemberAction.php
index 91df024cb..88c0e97cf 100644
--- a/src/Service/DynamoDb/src/ValueObject/DeleteReplicationGroupMemberAction.php
+++ b/src/Service/DynamoDb/src/ValueObject/DeleteReplicationGroupMemberAction.php
@@ -21,7 +21,7 @@ final class DeleteReplicationGroupMemberAction
      */
     public function __construct(array $input)
     {
-        $this->regionName = $input['RegionName'] ?? null;
+        $this->regionName = $input['RegionName'] ?? $this->throwException(new InvalidArgument('Missing required field "RegionName".'));
     }
 
     /**
@@ -45,11 +45,17 @@ public function getRegionName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->regionName) {
-            throw new InvalidArgument(sprintf('Missing parameter "RegionName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->regionName;
         $payload['RegionName'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/DeleteRequest.php b/src/Service/DynamoDb/src/ValueObject/DeleteRequest.php
index 6b4d8a7cc..2cc25a6ce 100644
--- a/src/Service/DynamoDb/src/ValueObject/DeleteRequest.php
+++ b/src/Service/DynamoDb/src/ValueObject/DeleteRequest.php
@@ -22,7 +22,7 @@ final class DeleteRequest
      */
     public function __construct(array $input)
     {
-        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : null;
+        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : $this->throwException(new InvalidArgument('Missing required field "Key".'));
     }
 
     /**
@@ -40,7 +40,7 @@ public static function create($input): self
      */
     public function getKey(): array
     {
-        return $this->key ?? [];
+        return $this->key;
     }
 
     /**
@@ -49,9 +49,7 @@ public function getKey(): array
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
 
         if (empty($v)) {
             $payload['Key'] = new \stdClass();
@@ -64,4 +62,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/Endpoint.php b/src/Service/DynamoDb/src/ValueObject/Endpoint.php
index 39c0150f4..bedeac374 100644
--- a/src/Service/DynamoDb/src/ValueObject/Endpoint.php
+++ b/src/Service/DynamoDb/src/ValueObject/Endpoint.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\DynamoDb\ValueObject;
 
 use AsyncAws\Core\EndpointDiscovery\EndpointInterface;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * An endpoint information details.
@@ -27,8 +28,8 @@ final class Endpoint implements EndpointInterface
      */
     public function __construct(array $input)
     {
-        $this->address = $input['Address'] ?? null;
-        $this->cachePeriodInMinutes = $input['CachePeriodInMinutes'] ?? null;
+        $this->address = $input['Address'] ?? $this->throwException(new InvalidArgument('Missing required field "Address".'));
+        $this->cachePeriodInMinutes = $input['CachePeriodInMinutes'] ?? $this->throwException(new InvalidArgument('Missing required field "CachePeriodInMinutes".'));
     }
 
     /**
@@ -51,4 +52,12 @@ public function getCachePeriodInMinutes(): int
     {
         return $this->cachePeriodInMinutes;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/GlobalSecondaryIndex.php b/src/Service/DynamoDb/src/ValueObject/GlobalSecondaryIndex.php
index 5451eb334..56187402b 100644
--- a/src/Service/DynamoDb/src/ValueObject/GlobalSecondaryIndex.php
+++ b/src/Service/DynamoDb/src/ValueObject/GlobalSecondaryIndex.php
@@ -56,9 +56,9 @@ final class GlobalSecondaryIndex
      */
     public function __construct(array $input)
     {
-        $this->indexName = $input['IndexName'] ?? null;
-        $this->keySchema = isset($input['KeySchema']) ? array_map([KeySchemaElement::class, 'create'], $input['KeySchema']) : null;
-        $this->projection = isset($input['Projection']) ? Projection::create($input['Projection']) : null;
+        $this->indexName = $input['IndexName'] ?? $this->throwException(new InvalidArgument('Missing required field "IndexName".'));
+        $this->keySchema = isset($input['KeySchema']) ? array_map([KeySchemaElement::class, 'create'], $input['KeySchema']) : $this->throwException(new InvalidArgument('Missing required field "KeySchema".'));
+        $this->projection = isset($input['Projection']) ? Projection::create($input['Projection']) : $this->throwException(new InvalidArgument('Missing required field "Projection".'));
         $this->provisionedThroughput = isset($input['ProvisionedThroughput']) ? ProvisionedThroughput::create($input['ProvisionedThroughput']) : null;
     }
 
@@ -85,7 +85,7 @@ public function getIndexName(): string
      */
     public function getKeySchema(): array
     {
-        return $this->keySchema ?? [];
+        return $this->keySchema;
     }
 
     public function getProjection(): Projection
@@ -104,13 +104,9 @@ public function getProvisionedThroughput(): ?ProvisionedThroughput
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->indexName) {
-            throw new InvalidArgument(sprintf('Missing parameter "IndexName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->indexName;
         $payload['IndexName'] = $v;
-        if (null === $v = $this->keySchema) {
-            throw new InvalidArgument(sprintf('Missing parameter "KeySchema" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->keySchema;
 
         $index = -1;
         $payload['KeySchema'] = [];
@@ -119,9 +115,7 @@ public function requestBody(): array
             $payload['KeySchema'][$index] = $listValue->requestBody();
         }
 
-        if (null === $v = $this->projection) {
-            throw new InvalidArgument(sprintf('Missing parameter "Projection" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->projection;
         $payload['Projection'] = $v->requestBody();
         if (null !== $v = $this->provisionedThroughput) {
             $payload['ProvisionedThroughput'] = $v->requestBody();
@@ -129,4 +123,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/KeySchemaElement.php b/src/Service/DynamoDb/src/ValueObject/KeySchemaElement.php
index 574db8857..d88570416 100644
--- a/src/Service/DynamoDb/src/ValueObject/KeySchemaElement.php
+++ b/src/Service/DynamoDb/src/ValueObject/KeySchemaElement.php
@@ -46,8 +46,8 @@ final class KeySchemaElement
      */
     public function __construct(array $input)
     {
-        $this->attributeName = $input['AttributeName'] ?? null;
-        $this->keyType = $input['KeyType'] ?? null;
+        $this->attributeName = $input['AttributeName'] ?? $this->throwException(new InvalidArgument('Missing required field "AttributeName".'));
+        $this->keyType = $input['KeyType'] ?? $this->throwException(new InvalidArgument('Missing required field "KeyType".'));
     }
 
     /**
@@ -80,13 +80,9 @@ public function getKeyType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->attributeName) {
-            throw new InvalidArgument(sprintf('Missing parameter "AttributeName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->attributeName;
         $payload['AttributeName'] = $v;
-        if (null === $v = $this->keyType) {
-            throw new InvalidArgument(sprintf('Missing parameter "KeyType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->keyType;
         if (!KeyType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "KeyType" for "%s". The value "%s" is not a valid "KeyType".', __CLASS__, $v));
         }
@@ -94,4 +90,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/KeysAndAttributes.php b/src/Service/DynamoDb/src/ValueObject/KeysAndAttributes.php
index 3b03df9a0..fba385e45 100644
--- a/src/Service/DynamoDb/src/ValueObject/KeysAndAttributes.php
+++ b/src/Service/DynamoDb/src/ValueObject/KeysAndAttributes.php
@@ -90,7 +90,7 @@ final class KeysAndAttributes
      */
     public function __construct(array $input)
     {
-        $this->keys = $input['Keys'] ?? null;
+        $this->keys = $input['Keys'] ?? $this->throwException(new InvalidArgument('Missing required field "Keys".'));
         $this->attributesToGet = $input['AttributesToGet'] ?? null;
         $this->consistentRead = $input['ConsistentRead'] ?? null;
         $this->projectionExpression = $input['ProjectionExpression'] ?? null;
@@ -137,7 +137,7 @@ public function getExpressionAttributeNames(): array
      */
     public function getKeys(): array
     {
-        return $this->keys ?? [];
+        return $this->keys;
     }
 
     public function getProjectionExpression(): ?string
@@ -151,9 +151,7 @@ public function getProjectionExpression(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->keys) {
-            throw new InvalidArgument(sprintf('Missing parameter "Keys" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->keys;
 
         $index = -1;
         $payload['Keys'] = [];
@@ -197,4 +195,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/LocalSecondaryIndex.php b/src/Service/DynamoDb/src/ValueObject/LocalSecondaryIndex.php
index 86975f53f..57d05c813 100644
--- a/src/Service/DynamoDb/src/ValueObject/LocalSecondaryIndex.php
+++ b/src/Service/DynamoDb/src/ValueObject/LocalSecondaryIndex.php
@@ -45,9 +45,9 @@ final class LocalSecondaryIndex
      */
     public function __construct(array $input)
     {
-        $this->indexName = $input['IndexName'] ?? null;
-        $this->keySchema = isset($input['KeySchema']) ? array_map([KeySchemaElement::class, 'create'], $input['KeySchema']) : null;
-        $this->projection = isset($input['Projection']) ? Projection::create($input['Projection']) : null;
+        $this->indexName = $input['IndexName'] ?? $this->throwException(new InvalidArgument('Missing required field "IndexName".'));
+        $this->keySchema = isset($input['KeySchema']) ? array_map([KeySchemaElement::class, 'create'], $input['KeySchema']) : $this->throwException(new InvalidArgument('Missing required field "KeySchema".'));
+        $this->projection = isset($input['Projection']) ? Projection::create($input['Projection']) : $this->throwException(new InvalidArgument('Missing required field "Projection".'));
     }
 
     /**
@@ -72,7 +72,7 @@ public function getIndexName(): string
      */
     public function getKeySchema(): array
     {
-        return $this->keySchema ?? [];
+        return $this->keySchema;
     }
 
     public function getProjection(): Projection
@@ -86,13 +86,9 @@ public function getProjection(): Projection
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->indexName) {
-            throw new InvalidArgument(sprintf('Missing parameter "IndexName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->indexName;
         $payload['IndexName'] = $v;
-        if (null === $v = $this->keySchema) {
-            throw new InvalidArgument(sprintf('Missing parameter "KeySchema" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->keySchema;
 
         $index = -1;
         $payload['KeySchema'] = [];
@@ -101,11 +97,17 @@ public function requestBody(): array
             $payload['KeySchema'][$index] = $listValue->requestBody();
         }
 
-        if (null === $v = $this->projection) {
-            throw new InvalidArgument(sprintf('Missing parameter "Projection" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->projection;
         $payload['Projection'] = $v->requestBody();
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/ProvisionedThroughput.php b/src/Service/DynamoDb/src/ValueObject/ProvisionedThroughput.php
index 815744eb6..7c98f7a36 100644
--- a/src/Service/DynamoDb/src/ValueObject/ProvisionedThroughput.php
+++ b/src/Service/DynamoDb/src/ValueObject/ProvisionedThroughput.php
@@ -43,8 +43,8 @@ final class ProvisionedThroughput
      */
     public function __construct(array $input)
     {
-        $this->readCapacityUnits = $input['ReadCapacityUnits'] ?? null;
-        $this->writeCapacityUnits = $input['WriteCapacityUnits'] ?? null;
+        $this->readCapacityUnits = $input['ReadCapacityUnits'] ?? $this->throwException(new InvalidArgument('Missing required field "ReadCapacityUnits".'));
+        $this->writeCapacityUnits = $input['WriteCapacityUnits'] ?? $this->throwException(new InvalidArgument('Missing required field "WriteCapacityUnits".'));
     }
 
     /**
@@ -74,15 +74,19 @@ public function getWriteCapacityUnits(): int
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->readCapacityUnits) {
-            throw new InvalidArgument(sprintf('Missing parameter "ReadCapacityUnits" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->readCapacityUnits;
         $payload['ReadCapacityUnits'] = $v;
-        if (null === $v = $this->writeCapacityUnits) {
-            throw new InvalidArgument(sprintf('Missing parameter "WriteCapacityUnits" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->writeCapacityUnits;
         $payload['WriteCapacityUnits'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/Put.php b/src/Service/DynamoDb/src/ValueObject/Put.php
index f1d2fddac..7e276bf06 100644
--- a/src/Service/DynamoDb/src/ValueObject/Put.php
+++ b/src/Service/DynamoDb/src/ValueObject/Put.php
@@ -56,8 +56,8 @@ final class Put
      */
     public function __construct(array $input)
     {
-        $this->item = isset($input['Item']) ? array_map([AttributeValue::class, 'create'], $input['Item']) : null;
-        $this->tableName = $input['TableName'] ?? null;
+        $this->item = isset($input['Item']) ? array_map([AttributeValue::class, 'create'], $input['Item']) : $this->throwException(new InvalidArgument('Missing required field "Item".'));
+        $this->tableName = $input['TableName'] ?? $this->throwException(new InvalidArgument('Missing required field "TableName".'));
         $this->conditionExpression = $input['ConditionExpression'] ?? null;
         $this->expressionAttributeNames = $input['ExpressionAttributeNames'] ?? null;
         $this->expressionAttributeValues = isset($input['ExpressionAttributeValues']) ? array_map([AttributeValue::class, 'create'], $input['ExpressionAttributeValues']) : null;
@@ -105,7 +105,7 @@ public function getExpressionAttributeValues(): array
      */
     public function getItem(): array
     {
-        return $this->item ?? [];
+        return $this->item;
     }
 
     /**
@@ -127,9 +127,7 @@ public function getTableName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->item) {
-            throw new InvalidArgument(sprintf('Missing parameter "Item" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->item;
 
         if (empty($v)) {
             $payload['Item'] = new \stdClass();
@@ -139,9 +137,7 @@ public function requestBody(): array
                 $payload['Item'][$name] = $mv->requestBody();
             }
         }
-        if (null === $v = $this->tableName) {
-            throw new InvalidArgument(sprintf('Missing parameter "TableName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tableName;
         $payload['TableName'] = $v;
         if (null !== $v = $this->conditionExpression) {
             $payload['ConditionExpression'] = $v;
@@ -175,4 +171,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/PutRequest.php b/src/Service/DynamoDb/src/ValueObject/PutRequest.php
index 8eb90cdbd..650d38384 100644
--- a/src/Service/DynamoDb/src/ValueObject/PutRequest.php
+++ b/src/Service/DynamoDb/src/ValueObject/PutRequest.php
@@ -24,7 +24,7 @@ final class PutRequest
      */
     public function __construct(array $input)
     {
-        $this->item = isset($input['Item']) ? array_map([AttributeValue::class, 'create'], $input['Item']) : null;
+        $this->item = isset($input['Item']) ? array_map([AttributeValue::class, 'create'], $input['Item']) : $this->throwException(new InvalidArgument('Missing required field "Item".'));
     }
 
     /**
@@ -42,7 +42,7 @@ public static function create($input): self
      */
     public function getItem(): array
     {
-        return $this->item ?? [];
+        return $this->item;
     }
 
     /**
@@ -51,9 +51,7 @@ public function getItem(): array
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->item) {
-            throw new InvalidArgument(sprintf('Missing parameter "Item" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->item;
 
         if (empty($v)) {
             $payload['Item'] = new \stdClass();
@@ -66,4 +64,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/ReplicaGlobalSecondaryIndex.php b/src/Service/DynamoDb/src/ValueObject/ReplicaGlobalSecondaryIndex.php
index 85cc973a5..8228b95c6 100644
--- a/src/Service/DynamoDb/src/ValueObject/ReplicaGlobalSecondaryIndex.php
+++ b/src/Service/DynamoDb/src/ValueObject/ReplicaGlobalSecondaryIndex.php
@@ -28,7 +28,7 @@ final class ReplicaGlobalSecondaryIndex
      */
     public function __construct(array $input)
     {
-        $this->indexName = $input['IndexName'] ?? null;
+        $this->indexName = $input['IndexName'] ?? $this->throwException(new InvalidArgument('Missing required field "IndexName".'));
         $this->provisionedThroughputOverride = isset($input['ProvisionedThroughputOverride']) ? ProvisionedThroughputOverride::create($input['ProvisionedThroughputOverride']) : null;
     }
 
@@ -59,9 +59,7 @@ public function getProvisionedThroughputOverride(): ?ProvisionedThroughputOverri
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->indexName) {
-            throw new InvalidArgument(sprintf('Missing parameter "IndexName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->indexName;
         $payload['IndexName'] = $v;
         if (null !== $v = $this->provisionedThroughputOverride) {
             $payload['ProvisionedThroughputOverride'] = $v->requestBody();
@@ -69,4 +67,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/RestoreSummary.php b/src/Service/DynamoDb/src/ValueObject/RestoreSummary.php
index 2982db324..fa1b564d7 100644
--- a/src/Service/DynamoDb/src/ValueObject/RestoreSummary.php
+++ b/src/Service/DynamoDb/src/ValueObject/RestoreSummary.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\DynamoDb\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains details for the restore.
  */
@@ -39,8 +41,8 @@ public function __construct(array $input)
     {
         $this->sourceBackupArn = $input['SourceBackupArn'] ?? null;
         $this->sourceTableArn = $input['SourceTableArn'] ?? null;
-        $this->restoreDateTime = $input['RestoreDateTime'] ?? null;
-        $this->restoreInProgress = $input['RestoreInProgress'] ?? null;
+        $this->restoreDateTime = $input['RestoreDateTime'] ?? $this->throwException(new InvalidArgument('Missing required field "RestoreDateTime".'));
+        $this->restoreInProgress = $input['RestoreInProgress'] ?? $this->throwException(new InvalidArgument('Missing required field "RestoreInProgress".'));
     }
 
     /**
@@ -75,4 +77,12 @@ public function getSourceTableArn(): ?string
     {
         return $this->sourceTableArn;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/StreamSpecification.php b/src/Service/DynamoDb/src/ValueObject/StreamSpecification.php
index 7b26cb86e..09def8ee1 100644
--- a/src/Service/DynamoDb/src/ValueObject/StreamSpecification.php
+++ b/src/Service/DynamoDb/src/ValueObject/StreamSpecification.php
@@ -34,7 +34,7 @@ final class StreamSpecification
      */
     public function __construct(array $input)
     {
-        $this->streamEnabled = $input['StreamEnabled'] ?? null;
+        $this->streamEnabled = $input['StreamEnabled'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamEnabled".'));
         $this->streamViewType = $input['StreamViewType'] ?? null;
     }
 
@@ -68,9 +68,7 @@ public function getStreamViewType(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->streamEnabled) {
-            throw new InvalidArgument(sprintf('Missing parameter "StreamEnabled" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->streamEnabled;
         $payload['StreamEnabled'] = (bool) $v;
         if (null !== $v = $this->streamViewType) {
             if (!StreamViewType::exists($v)) {
@@ -81,4 +79,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/Tag.php b/src/Service/DynamoDb/src/ValueObject/Tag.php
index daa8c64bb..19ffacaf5 100644
--- a/src/Service/DynamoDb/src/ValueObject/Tag.php
+++ b/src/Service/DynamoDb/src/ValueObject/Tag.php
@@ -37,8 +37,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -68,15 +68,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/TimeToLiveSpecification.php b/src/Service/DynamoDb/src/ValueObject/TimeToLiveSpecification.php
index 23989c732..7ed7e4a9b 100644
--- a/src/Service/DynamoDb/src/ValueObject/TimeToLiveSpecification.php
+++ b/src/Service/DynamoDb/src/ValueObject/TimeToLiveSpecification.php
@@ -27,8 +27,8 @@ final class TimeToLiveSpecification
      */
     public function __construct(array $input)
     {
-        $this->enabled = $input['Enabled'] ?? null;
-        $this->attributeName = $input['AttributeName'] ?? null;
+        $this->enabled = $input['Enabled'] ?? $this->throwException(new InvalidArgument('Missing required field "Enabled".'));
+        $this->attributeName = $input['AttributeName'] ?? $this->throwException(new InvalidArgument('Missing required field "AttributeName".'));
     }
 
     /**
@@ -58,15 +58,19 @@ public function getEnabled(): bool
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->enabled) {
-            throw new InvalidArgument(sprintf('Missing parameter "Enabled" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->enabled;
         $payload['Enabled'] = (bool) $v;
-        if (null === $v = $this->attributeName) {
-            throw new InvalidArgument(sprintf('Missing parameter "AttributeName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->attributeName;
         $payload['AttributeName'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/Update.php b/src/Service/DynamoDb/src/ValueObject/Update.php
index 364a3ab7e..90702eb86 100644
--- a/src/Service/DynamoDb/src/ValueObject/Update.php
+++ b/src/Service/DynamoDb/src/ValueObject/Update.php
@@ -60,9 +60,9 @@ final class Update
      */
     public function __construct(array $input)
     {
-        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : null;
-        $this->updateExpression = $input['UpdateExpression'] ?? null;
-        $this->tableName = $input['TableName'] ?? null;
+        $this->key = isset($input['Key']) ? array_map([AttributeValue::class, 'create'], $input['Key']) : $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->updateExpression = $input['UpdateExpression'] ?? $this->throwException(new InvalidArgument('Missing required field "UpdateExpression".'));
+        $this->tableName = $input['TableName'] ?? $this->throwException(new InvalidArgument('Missing required field "TableName".'));
         $this->conditionExpression = $input['ConditionExpression'] ?? null;
         $this->expressionAttributeNames = $input['ExpressionAttributeNames'] ?? null;
         $this->expressionAttributeValues = isset($input['ExpressionAttributeValues']) ? array_map([AttributeValue::class, 'create'], $input['ExpressionAttributeValues']) : null;
@@ -111,7 +111,7 @@ public function getExpressionAttributeValues(): array
      */
     public function getKey(): array
     {
-        return $this->key ?? [];
+        return $this->key;
     }
 
     /**
@@ -138,9 +138,7 @@ public function getUpdateExpression(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
 
         if (empty($v)) {
             $payload['Key'] = new \stdClass();
@@ -150,13 +148,9 @@ public function requestBody(): array
                 $payload['Key'][$name] = $mv->requestBody();
             }
         }
-        if (null === $v = $this->updateExpression) {
-            throw new InvalidArgument(sprintf('Missing parameter "UpdateExpression" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->updateExpression;
         $payload['UpdateExpression'] = $v;
-        if (null === $v = $this->tableName) {
-            throw new InvalidArgument(sprintf('Missing parameter "TableName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tableName;
         $payload['TableName'] = $v;
         if (null !== $v = $this->conditionExpression) {
             $payload['ConditionExpression'] = $v;
@@ -190,4 +184,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/UpdateGlobalSecondaryIndexAction.php b/src/Service/DynamoDb/src/ValueObject/UpdateGlobalSecondaryIndexAction.php
index ea97132aa..b3b2b3712 100644
--- a/src/Service/DynamoDb/src/ValueObject/UpdateGlobalSecondaryIndexAction.php
+++ b/src/Service/DynamoDb/src/ValueObject/UpdateGlobalSecondaryIndexAction.php
@@ -32,8 +32,8 @@ final class UpdateGlobalSecondaryIndexAction
      */
     public function __construct(array $input)
     {
-        $this->indexName = $input['IndexName'] ?? null;
-        $this->provisionedThroughput = isset($input['ProvisionedThroughput']) ? ProvisionedThroughput::create($input['ProvisionedThroughput']) : null;
+        $this->indexName = $input['IndexName'] ?? $this->throwException(new InvalidArgument('Missing required field "IndexName".'));
+        $this->provisionedThroughput = isset($input['ProvisionedThroughput']) ? ProvisionedThroughput::create($input['ProvisionedThroughput']) : $this->throwException(new InvalidArgument('Missing required field "ProvisionedThroughput".'));
     }
 
     /**
@@ -63,15 +63,19 @@ public function getProvisionedThroughput(): ProvisionedThroughput
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->indexName) {
-            throw new InvalidArgument(sprintf('Missing parameter "IndexName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->indexName;
         $payload['IndexName'] = $v;
-        if (null === $v = $this->provisionedThroughput) {
-            throw new InvalidArgument(sprintf('Missing parameter "ProvisionedThroughput" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->provisionedThroughput;
         $payload['ProvisionedThroughput'] = $v->requestBody();
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/DynamoDb/src/ValueObject/UpdateReplicationGroupMemberAction.php b/src/Service/DynamoDb/src/ValueObject/UpdateReplicationGroupMemberAction.php
index c8872c399..213800d4a 100644
--- a/src/Service/DynamoDb/src/ValueObject/UpdateReplicationGroupMemberAction.php
+++ b/src/Service/DynamoDb/src/ValueObject/UpdateReplicationGroupMemberAction.php
@@ -48,7 +48,7 @@ final class UpdateReplicationGroupMemberAction
      */
     public function __construct(array $input)
     {
-        $this->regionName = $input['RegionName'] ?? null;
+        $this->regionName = $input['RegionName'] ?? $this->throwException(new InvalidArgument('Missing required field "RegionName".'));
         $this->kmsMasterKeyId = $input['KMSMasterKeyId'] ?? null;
         $this->provisionedThroughputOverride = isset($input['ProvisionedThroughputOverride']) ? ProvisionedThroughputOverride::create($input['ProvisionedThroughputOverride']) : null;
         $this->globalSecondaryIndexes = isset($input['GlobalSecondaryIndexes']) ? array_map([ReplicaGlobalSecondaryIndex::class, 'create'], $input['GlobalSecondaryIndexes']) : null;
@@ -106,9 +106,7 @@ public function getTableClassOverride(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->regionName) {
-            throw new InvalidArgument(sprintf('Missing parameter "RegionName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->regionName;
         $payload['RegionName'] = $v;
         if (null !== $v = $this->kmsMasterKeyId) {
             $payload['KMSMasterKeyId'] = $v;
@@ -133,4 +131,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Firehose/src/ValueObject/Record.php b/src/Service/Firehose/src/ValueObject/Record.php
index 04559482f..ea9216ec2 100644
--- a/src/Service/Firehose/src/ValueObject/Record.php
+++ b/src/Service/Firehose/src/ValueObject/Record.php
@@ -22,7 +22,7 @@ final class Record
      */
     public function __construct(array $input)
     {
-        $this->data = $input['Data'] ?? null;
+        $this->data = $input['Data'] ?? $this->throwException(new InvalidArgument('Missing required field "Data".'));
     }
 
     /**
@@ -46,11 +46,17 @@ public function getData(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->data) {
-            throw new InvalidArgument(sprintf('Missing parameter "Data" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->data;
         $payload['Data'] = base64_encode($v);
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Iam/src/ValueObject/AccessKey.php b/src/Service/Iam/src/ValueObject/AccessKey.php
index 47453a6cb..2ed20a753 100644
--- a/src/Service/Iam/src/ValueObject/AccessKey.php
+++ b/src/Service/Iam/src/ValueObject/AccessKey.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Iam\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Iam\Enum\StatusType;
 
 /**
@@ -51,10 +52,10 @@ final class AccessKey
      */
     public function __construct(array $input)
     {
-        $this->userName = $input['UserName'] ?? null;
-        $this->accessKeyId = $input['AccessKeyId'] ?? null;
-        $this->status = $input['Status'] ?? null;
-        $this->secretAccessKey = $input['SecretAccessKey'] ?? null;
+        $this->userName = $input['UserName'] ?? $this->throwException(new InvalidArgument('Missing required field "UserName".'));
+        $this->accessKeyId = $input['AccessKeyId'] ?? $this->throwException(new InvalidArgument('Missing required field "AccessKeyId".'));
+        $this->status = $input['Status'] ?? $this->throwException(new InvalidArgument('Missing required field "Status".'));
+        $this->secretAccessKey = $input['SecretAccessKey'] ?? $this->throwException(new InvalidArgument('Missing required field "SecretAccessKey".'));
         $this->createDate = $input['CreateDate'] ?? null;
     }
 
@@ -99,4 +100,12 @@ public function getUserName(): string
     {
         return $this->userName;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Iam/src/ValueObject/ServiceSpecificCredential.php b/src/Service/Iam/src/ValueObject/ServiceSpecificCredential.php
index fa19a4ff3..8c929222a 100644
--- a/src/Service/Iam/src/ValueObject/ServiceSpecificCredential.php
+++ b/src/Service/Iam/src/ValueObject/ServiceSpecificCredential.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Iam\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Iam\Enum\StatusType;
 
 /**
@@ -62,13 +63,13 @@ final class ServiceSpecificCredential
      */
     public function __construct(array $input)
     {
-        $this->createDate = $input['CreateDate'] ?? null;
-        $this->serviceName = $input['ServiceName'] ?? null;
-        $this->serviceUserName = $input['ServiceUserName'] ?? null;
-        $this->servicePassword = $input['ServicePassword'] ?? null;
-        $this->serviceSpecificCredentialId = $input['ServiceSpecificCredentialId'] ?? null;
-        $this->userName = $input['UserName'] ?? null;
-        $this->status = $input['Status'] ?? null;
+        $this->createDate = $input['CreateDate'] ?? $this->throwException(new InvalidArgument('Missing required field "CreateDate".'));
+        $this->serviceName = $input['ServiceName'] ?? $this->throwException(new InvalidArgument('Missing required field "ServiceName".'));
+        $this->serviceUserName = $input['ServiceUserName'] ?? $this->throwException(new InvalidArgument('Missing required field "ServiceUserName".'));
+        $this->servicePassword = $input['ServicePassword'] ?? $this->throwException(new InvalidArgument('Missing required field "ServicePassword".'));
+        $this->serviceSpecificCredentialId = $input['ServiceSpecificCredentialId'] ?? $this->throwException(new InvalidArgument('Missing required field "ServiceSpecificCredentialId".'));
+        $this->userName = $input['UserName'] ?? $this->throwException(new InvalidArgument('Missing required field "UserName".'));
+        $this->status = $input['Status'] ?? $this->throwException(new InvalidArgument('Missing required field "Status".'));
     }
 
     /**
@@ -124,4 +125,12 @@ public function getUserName(): string
     {
         return $this->userName;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Iam/src/ValueObject/ServiceSpecificCredentialMetadata.php b/src/Service/Iam/src/ValueObject/ServiceSpecificCredentialMetadata.php
index c2a603c5c..c001b3400 100644
--- a/src/Service/Iam/src/ValueObject/ServiceSpecificCredentialMetadata.php
+++ b/src/Service/Iam/src/ValueObject/ServiceSpecificCredentialMetadata.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Iam\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Iam\Enum\StatusType;
 
 /**
@@ -54,12 +55,12 @@ final class ServiceSpecificCredentialMetadata
      */
     public function __construct(array $input)
     {
-        $this->userName = $input['UserName'] ?? null;
-        $this->status = $input['Status'] ?? null;
-        $this->serviceUserName = $input['ServiceUserName'] ?? null;
-        $this->createDate = $input['CreateDate'] ?? null;
-        $this->serviceSpecificCredentialId = $input['ServiceSpecificCredentialId'] ?? null;
-        $this->serviceName = $input['ServiceName'] ?? null;
+        $this->userName = $input['UserName'] ?? $this->throwException(new InvalidArgument('Missing required field "UserName".'));
+        $this->status = $input['Status'] ?? $this->throwException(new InvalidArgument('Missing required field "Status".'));
+        $this->serviceUserName = $input['ServiceUserName'] ?? $this->throwException(new InvalidArgument('Missing required field "ServiceUserName".'));
+        $this->createDate = $input['CreateDate'] ?? $this->throwException(new InvalidArgument('Missing required field "CreateDate".'));
+        $this->serviceSpecificCredentialId = $input['ServiceSpecificCredentialId'] ?? $this->throwException(new InvalidArgument('Missing required field "ServiceSpecificCredentialId".'));
+        $this->serviceName = $input['ServiceName'] ?? $this->throwException(new InvalidArgument('Missing required field "ServiceName".'));
     }
 
     /**
@@ -109,4 +110,12 @@ public function getUserName(): string
     {
         return $this->userName;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Iam/src/ValueObject/Tag.php b/src/Service/Iam/src/ValueObject/Tag.php
index 0b4a6d1ad..9b4acd343 100644
--- a/src/Service/Iam/src/ValueObject/Tag.php
+++ b/src/Service/Iam/src/ValueObject/Tag.php
@@ -37,8 +37,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -68,15 +68,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Iam/src/ValueObject/User.php b/src/Service/Iam/src/ValueObject/User.php
index 948025065..b0deaa705 100644
--- a/src/Service/Iam/src/ValueObject/User.php
+++ b/src/Service/Iam/src/ValueObject/User.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Iam\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains information about an IAM user entity.
  *
@@ -100,11 +102,11 @@ final class User
      */
     public function __construct(array $input)
     {
-        $this->path = $input['Path'] ?? null;
-        $this->userName = $input['UserName'] ?? null;
-        $this->userId = $input['UserId'] ?? null;
-        $this->arn = $input['Arn'] ?? null;
-        $this->createDate = $input['CreateDate'] ?? null;
+        $this->path = $input['Path'] ?? $this->throwException(new InvalidArgument('Missing required field "Path".'));
+        $this->userName = $input['UserName'] ?? $this->throwException(new InvalidArgument('Missing required field "UserName".'));
+        $this->userId = $input['UserId'] ?? $this->throwException(new InvalidArgument('Missing required field "UserId".'));
+        $this->arn = $input['Arn'] ?? $this->throwException(new InvalidArgument('Missing required field "Arn".'));
+        $this->createDate = $input['CreateDate'] ?? $this->throwException(new InvalidArgument('Missing required field "CreateDate".'));
         $this->passwordLastUsed = $input['PasswordLastUsed'] ?? null;
         $this->permissionsBoundary = isset($input['PermissionsBoundary']) ? AttachedPermissionsBoundary::create($input['PermissionsBoundary']) : null;
         $this->tags = isset($input['Tags']) ? array_map([Tag::class, 'create'], $input['Tags']) : null;
@@ -169,4 +171,12 @@ public function getUserName(): string
     {
         return $this->userName;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Iot/src/ValueObject/Tag.php b/src/Service/Iot/src/ValueObject/Tag.php
index 7a784f8b5..cbfd3ec43 100644
--- a/src/Service/Iot/src/ValueObject/Tag.php
+++ b/src/Service/Iot/src/ValueObject/Tag.php
@@ -27,7 +27,7 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
         $this->value = $input['Value'] ?? null;
     }
 
@@ -58,9 +58,7 @@ public function getValue(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
         if (null !== $v = $this->value) {
             $payload['Value'] = $v;
@@ -68,4 +66,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/ChildShard.php b/src/Service/Kinesis/src/ValueObject/ChildShard.php
index 29ccbee8b..65553a5be 100644
--- a/src/Service/Kinesis/src/ValueObject/ChildShard.php
+++ b/src/Service/Kinesis/src/ValueObject/ChildShard.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Output parameter of the GetRecords API. The existing child shard of the current shard.
  */
@@ -28,9 +30,9 @@ final class ChildShard
      */
     public function __construct(array $input)
     {
-        $this->shardId = $input['ShardId'] ?? null;
-        $this->parentShards = $input['ParentShards'] ?? null;
-        $this->hashKeyRange = isset($input['HashKeyRange']) ? HashKeyRange::create($input['HashKeyRange']) : null;
+        $this->shardId = $input['ShardId'] ?? $this->throwException(new InvalidArgument('Missing required field "ShardId".'));
+        $this->parentShards = $input['ParentShards'] ?? $this->throwException(new InvalidArgument('Missing required field "ParentShards".'));
+        $this->hashKeyRange = isset($input['HashKeyRange']) ? HashKeyRange::create($input['HashKeyRange']) : $this->throwException(new InvalidArgument('Missing required field "HashKeyRange".'));
     }
 
     /**
@@ -55,11 +57,19 @@ public function getHashKeyRange(): HashKeyRange
      */
     public function getParentShards(): array
     {
-        return $this->parentShards ?? [];
+        return $this->parentShards;
     }
 
     public function getShardId(): string
     {
         return $this->shardId;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/Consumer.php b/src/Service/Kinesis/src/ValueObject/Consumer.php
index fe268d24f..bcafb1b6e 100644
--- a/src/Service/Kinesis/src/ValueObject/Consumer.php
+++ b/src/Service/Kinesis/src/ValueObject/Consumer.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kinesis\Enum\ConsumerStatus;
 
 /**
@@ -42,10 +43,10 @@ final class Consumer
      */
     public function __construct(array $input)
     {
-        $this->consumerName = $input['ConsumerName'] ?? null;
-        $this->consumerArn = $input['ConsumerARN'] ?? null;
-        $this->consumerStatus = $input['ConsumerStatus'] ?? null;
-        $this->consumerCreationTimestamp = $input['ConsumerCreationTimestamp'] ?? null;
+        $this->consumerName = $input['ConsumerName'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerName".'));
+        $this->consumerArn = $input['ConsumerARN'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerARN".'));
+        $this->consumerStatus = $input['ConsumerStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerStatus".'));
+        $this->consumerCreationTimestamp = $input['ConsumerCreationTimestamp'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerCreationTimestamp".'));
     }
 
     /**
@@ -83,4 +84,12 @@ public function getConsumerStatus(): string
     {
         return $this->consumerStatus;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/ConsumerDescription.php b/src/Service/Kinesis/src/ValueObject/ConsumerDescription.php
index 44b97bbc7..0158ffc2d 100644
--- a/src/Service/Kinesis/src/ValueObject/ConsumerDescription.php
+++ b/src/Service/Kinesis/src/ValueObject/ConsumerDescription.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kinesis\Enum\ConsumerStatus;
 
 /**
@@ -48,11 +49,11 @@ final class ConsumerDescription
      */
     public function __construct(array $input)
     {
-        $this->consumerName = $input['ConsumerName'] ?? null;
-        $this->consumerArn = $input['ConsumerARN'] ?? null;
-        $this->consumerStatus = $input['ConsumerStatus'] ?? null;
-        $this->consumerCreationTimestamp = $input['ConsumerCreationTimestamp'] ?? null;
-        $this->streamArn = $input['StreamARN'] ?? null;
+        $this->consumerName = $input['ConsumerName'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerName".'));
+        $this->consumerArn = $input['ConsumerARN'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerARN".'));
+        $this->consumerStatus = $input['ConsumerStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerStatus".'));
+        $this->consumerCreationTimestamp = $input['ConsumerCreationTimestamp'] ?? $this->throwException(new InvalidArgument('Missing required field "ConsumerCreationTimestamp".'));
+        $this->streamArn = $input['StreamARN'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamARN".'));
     }
 
     /**
@@ -96,4 +97,12 @@ public function getStreamArn(): string
     {
         return $this->streamArn;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/HashKeyRange.php b/src/Service/Kinesis/src/ValueObject/HashKeyRange.php
index 4b9ba383a..aa9a10da2 100644
--- a/src/Service/Kinesis/src/ValueObject/HashKeyRange.php
+++ b/src/Service/Kinesis/src/ValueObject/HashKeyRange.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The range of possible hash key values for the shard, which is a set of ordered contiguous positive integers.
  */
@@ -25,8 +27,8 @@ final class HashKeyRange
      */
     public function __construct(array $input)
     {
-        $this->startingHashKey = $input['StartingHashKey'] ?? null;
-        $this->endingHashKey = $input['EndingHashKey'] ?? null;
+        $this->startingHashKey = $input['StartingHashKey'] ?? $this->throwException(new InvalidArgument('Missing required field "StartingHashKey".'));
+        $this->endingHashKey = $input['EndingHashKey'] ?? $this->throwException(new InvalidArgument('Missing required field "EndingHashKey".'));
     }
 
     /**
@@ -49,4 +51,12 @@ public function getStartingHashKey(): string
     {
         return $this->startingHashKey;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/PutRecordsRequestEntry.php b/src/Service/Kinesis/src/ValueObject/PutRecordsRequestEntry.php
index d4f4a1d44..102082265 100644
--- a/src/Service/Kinesis/src/ValueObject/PutRecordsRequestEntry.php
+++ b/src/Service/Kinesis/src/ValueObject/PutRecordsRequestEntry.php
@@ -40,9 +40,9 @@ final class PutRecordsRequestEntry
      */
     public function __construct(array $input)
     {
-        $this->data = $input['Data'] ?? null;
+        $this->data = $input['Data'] ?? $this->throwException(new InvalidArgument('Missing required field "Data".'));
         $this->explicitHashKey = $input['ExplicitHashKey'] ?? null;
-        $this->partitionKey = $input['PartitionKey'] ?? null;
+        $this->partitionKey = $input['PartitionKey'] ?? $this->throwException(new InvalidArgument('Missing required field "PartitionKey".'));
     }
 
     /**
@@ -78,18 +78,22 @@ public function getPartitionKey(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->data) {
-            throw new InvalidArgument(sprintf('Missing parameter "Data" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->data;
         $payload['Data'] = base64_encode($v);
         if (null !== $v = $this->explicitHashKey) {
             $payload['ExplicitHashKey'] = $v;
         }
-        if (null === $v = $this->partitionKey) {
-            throw new InvalidArgument(sprintf('Missing parameter "PartitionKey" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->partitionKey;
         $payload['PartitionKey'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/Record.php b/src/Service/Kinesis/src/ValueObject/Record.php
index 62616598e..6a729cbf4 100644
--- a/src/Service/Kinesis/src/ValueObject/Record.php
+++ b/src/Service/Kinesis/src/ValueObject/Record.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kinesis\Enum\EncryptionType;
 
 /**
@@ -52,10 +53,10 @@ final class Record
      */
     public function __construct(array $input)
     {
-        $this->sequenceNumber = $input['SequenceNumber'] ?? null;
+        $this->sequenceNumber = $input['SequenceNumber'] ?? $this->throwException(new InvalidArgument('Missing required field "SequenceNumber".'));
         $this->approximateArrivalTimestamp = $input['ApproximateArrivalTimestamp'] ?? null;
-        $this->data = $input['Data'] ?? null;
-        $this->partitionKey = $input['PartitionKey'] ?? null;
+        $this->data = $input['Data'] ?? $this->throwException(new InvalidArgument('Missing required field "Data".'));
+        $this->partitionKey = $input['PartitionKey'] ?? $this->throwException(new InvalidArgument('Missing required field "PartitionKey".'));
         $this->encryptionType = $input['EncryptionType'] ?? null;
     }
 
@@ -100,4 +101,12 @@ public function getSequenceNumber(): string
     {
         return $this->sequenceNumber;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/SequenceNumberRange.php b/src/Service/Kinesis/src/ValueObject/SequenceNumberRange.php
index ae2f5b16a..52a7c69a7 100644
--- a/src/Service/Kinesis/src/ValueObject/SequenceNumberRange.php
+++ b/src/Service/Kinesis/src/ValueObject/SequenceNumberRange.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The range of possible sequence numbers for the shard.
  */
@@ -25,7 +27,7 @@ final class SequenceNumberRange
      */
     public function __construct(array $input)
     {
-        $this->startingSequenceNumber = $input['StartingSequenceNumber'] ?? null;
+        $this->startingSequenceNumber = $input['StartingSequenceNumber'] ?? $this->throwException(new InvalidArgument('Missing required field "StartingSequenceNumber".'));
         $this->endingSequenceNumber = $input['EndingSequenceNumber'] ?? null;
     }
 
@@ -49,4 +51,12 @@ public function getStartingSequenceNumber(): string
     {
         return $this->startingSequenceNumber;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/Shard.php b/src/Service/Kinesis/src/ValueObject/Shard.php
index 559e98a8a..22e2a378b 100644
--- a/src/Service/Kinesis/src/ValueObject/Shard.php
+++ b/src/Service/Kinesis/src/ValueObject/Shard.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * A uniquely identified group of data records in a Kinesis data stream.
  */
@@ -43,11 +45,11 @@ final class Shard
      */
     public function __construct(array $input)
     {
-        $this->shardId = $input['ShardId'] ?? null;
+        $this->shardId = $input['ShardId'] ?? $this->throwException(new InvalidArgument('Missing required field "ShardId".'));
         $this->parentShardId = $input['ParentShardId'] ?? null;
         $this->adjacentParentShardId = $input['AdjacentParentShardId'] ?? null;
-        $this->hashKeyRange = isset($input['HashKeyRange']) ? HashKeyRange::create($input['HashKeyRange']) : null;
-        $this->sequenceNumberRange = isset($input['SequenceNumberRange']) ? SequenceNumberRange::create($input['SequenceNumberRange']) : null;
+        $this->hashKeyRange = isset($input['HashKeyRange']) ? HashKeyRange::create($input['HashKeyRange']) : $this->throwException(new InvalidArgument('Missing required field "HashKeyRange".'));
+        $this->sequenceNumberRange = isset($input['SequenceNumberRange']) ? SequenceNumberRange::create($input['SequenceNumberRange']) : $this->throwException(new InvalidArgument('Missing required field "SequenceNumberRange".'));
     }
 
     /**
@@ -88,4 +90,12 @@ public function getShardId(): string
     {
         return $this->shardId;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/ShardFilter.php b/src/Service/Kinesis/src/ValueObject/ShardFilter.php
index 758e78b5e..23017d50d 100644
--- a/src/Service/Kinesis/src/ValueObject/ShardFilter.php
+++ b/src/Service/Kinesis/src/ValueObject/ShardFilter.php
@@ -51,7 +51,7 @@ final class ShardFilter
      */
     public function __construct(array $input)
     {
-        $this->type = $input['Type'] ?? null;
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
         $this->shardId = $input['ShardId'] ?? null;
         $this->timestamp = $input['Timestamp'] ?? null;
     }
@@ -92,9 +92,7 @@ public function getType(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "Type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!ShardFilterType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "Type" for "%s". The value "%s" is not a valid "ShardFilterType".', __CLASS__, $v));
         }
@@ -108,4 +106,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/StreamDescription.php b/src/Service/Kinesis/src/ValueObject/StreamDescription.php
index 6563a1db1..4b5635238 100644
--- a/src/Service/Kinesis/src/ValueObject/StreamDescription.php
+++ b/src/Service/Kinesis/src/ValueObject/StreamDescription.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kinesis\Enum\EncryptionType;
 use AsyncAws\Kinesis\Enum\StreamStatus;
 
@@ -104,15 +105,15 @@ final class StreamDescription
      */
     public function __construct(array $input)
     {
-        $this->streamName = $input['StreamName'] ?? null;
-        $this->streamArn = $input['StreamARN'] ?? null;
-        $this->streamStatus = $input['StreamStatus'] ?? null;
+        $this->streamName = $input['StreamName'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamName".'));
+        $this->streamArn = $input['StreamARN'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamARN".'));
+        $this->streamStatus = $input['StreamStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamStatus".'));
         $this->streamModeDetails = isset($input['StreamModeDetails']) ? StreamModeDetails::create($input['StreamModeDetails']) : null;
-        $this->shards = isset($input['Shards']) ? array_map([Shard::class, 'create'], $input['Shards']) : null;
-        $this->hasMoreShards = $input['HasMoreShards'] ?? null;
-        $this->retentionPeriodHours = $input['RetentionPeriodHours'] ?? null;
-        $this->streamCreationTimestamp = $input['StreamCreationTimestamp'] ?? null;
-        $this->enhancedMonitoring = isset($input['EnhancedMonitoring']) ? array_map([EnhancedMetrics::class, 'create'], $input['EnhancedMonitoring']) : null;
+        $this->shards = isset($input['Shards']) ? array_map([Shard::class, 'create'], $input['Shards']) : $this->throwException(new InvalidArgument('Missing required field "Shards".'));
+        $this->hasMoreShards = $input['HasMoreShards'] ?? $this->throwException(new InvalidArgument('Missing required field "HasMoreShards".'));
+        $this->retentionPeriodHours = $input['RetentionPeriodHours'] ?? $this->throwException(new InvalidArgument('Missing required field "RetentionPeriodHours".'));
+        $this->streamCreationTimestamp = $input['StreamCreationTimestamp'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamCreationTimestamp".'));
+        $this->enhancedMonitoring = isset($input['EnhancedMonitoring']) ? array_map([EnhancedMetrics::class, 'create'], $input['EnhancedMonitoring']) : $this->throwException(new InvalidArgument('Missing required field "EnhancedMonitoring".'));
         $this->encryptionType = $input['EncryptionType'] ?? null;
         $this->keyId = $input['KeyId'] ?? null;
     }
@@ -150,7 +151,7 @@ public function getEncryptionType(): ?string
      */
     public function getEnhancedMonitoring(): array
     {
-        return $this->enhancedMonitoring ?? [];
+        return $this->enhancedMonitoring;
     }
 
     public function getHasMoreShards(): bool
@@ -173,7 +174,7 @@ public function getRetentionPeriodHours(): int
      */
     public function getShards(): array
     {
-        return $this->shards ?? [];
+        return $this->shards;
     }
 
     public function getStreamArn(): string
@@ -203,4 +204,12 @@ public function getStreamStatus(): string
     {
         return $this->streamStatus;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/StreamDescriptionSummary.php b/src/Service/Kinesis/src/ValueObject/StreamDescriptionSummary.php
index 661e18367..6d29315d4 100644
--- a/src/Service/Kinesis/src/ValueObject/StreamDescriptionSummary.php
+++ b/src/Service/Kinesis/src/ValueObject/StreamDescriptionSummary.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kinesis\Enum\EncryptionType;
 use AsyncAws\Kinesis\Enum\StreamStatus;
 
@@ -103,16 +104,16 @@ final class StreamDescriptionSummary
      */
     public function __construct(array $input)
     {
-        $this->streamName = $input['StreamName'] ?? null;
-        $this->streamArn = $input['StreamARN'] ?? null;
-        $this->streamStatus = $input['StreamStatus'] ?? null;
+        $this->streamName = $input['StreamName'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamName".'));
+        $this->streamArn = $input['StreamARN'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamARN".'));
+        $this->streamStatus = $input['StreamStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamStatus".'));
         $this->streamModeDetails = isset($input['StreamModeDetails']) ? StreamModeDetails::create($input['StreamModeDetails']) : null;
-        $this->retentionPeriodHours = $input['RetentionPeriodHours'] ?? null;
-        $this->streamCreationTimestamp = $input['StreamCreationTimestamp'] ?? null;
-        $this->enhancedMonitoring = isset($input['EnhancedMonitoring']) ? array_map([EnhancedMetrics::class, 'create'], $input['EnhancedMonitoring']) : null;
+        $this->retentionPeriodHours = $input['RetentionPeriodHours'] ?? $this->throwException(new InvalidArgument('Missing required field "RetentionPeriodHours".'));
+        $this->streamCreationTimestamp = $input['StreamCreationTimestamp'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamCreationTimestamp".'));
+        $this->enhancedMonitoring = isset($input['EnhancedMonitoring']) ? array_map([EnhancedMetrics::class, 'create'], $input['EnhancedMonitoring']) : $this->throwException(new InvalidArgument('Missing required field "EnhancedMonitoring".'));
         $this->encryptionType = $input['EncryptionType'] ?? null;
         $this->keyId = $input['KeyId'] ?? null;
-        $this->openShardCount = $input['OpenShardCount'] ?? null;
+        $this->openShardCount = $input['OpenShardCount'] ?? $this->throwException(new InvalidArgument('Missing required field "OpenShardCount".'));
         $this->consumerCount = $input['ConsumerCount'] ?? null;
     }
 
@@ -154,7 +155,7 @@ public function getEncryptionType(): ?string
      */
     public function getEnhancedMonitoring(): array
     {
-        return $this->enhancedMonitoring ?? [];
+        return $this->enhancedMonitoring;
     }
 
     public function getKeyId(): ?string
@@ -199,4 +200,12 @@ public function getStreamStatus(): string
     {
         return $this->streamStatus;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/StreamModeDetails.php b/src/Service/Kinesis/src/ValueObject/StreamModeDetails.php
index fda4763e8..c389c0a7d 100644
--- a/src/Service/Kinesis/src/ValueObject/StreamModeDetails.php
+++ b/src/Service/Kinesis/src/ValueObject/StreamModeDetails.php
@@ -24,7 +24,7 @@ final class StreamModeDetails
      */
     public function __construct(array $input)
     {
-        $this->streamMode = $input['StreamMode'] ?? null;
+        $this->streamMode = $input['StreamMode'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamMode".'));
     }
 
     /**
@@ -51,9 +51,7 @@ public function getStreamMode(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->streamMode) {
-            throw new InvalidArgument(sprintf('Missing parameter "StreamMode" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->streamMode;
         if (!StreamMode::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "StreamMode" for "%s". The value "%s" is not a valid "StreamMode".', __CLASS__, $v));
         }
@@ -61,4 +59,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/StreamSummary.php b/src/Service/Kinesis/src/ValueObject/StreamSummary.php
index 184df1b36..fbc9e3436 100644
--- a/src/Service/Kinesis/src/ValueObject/StreamSummary.php
+++ b/src/Service/Kinesis/src/ValueObject/StreamSummary.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kinesis\Enum\StreamStatus;
 
 /**
@@ -42,9 +43,9 @@ final class StreamSummary
      */
     public function __construct(array $input)
     {
-        $this->streamName = $input['StreamName'] ?? null;
-        $this->streamArn = $input['StreamARN'] ?? null;
-        $this->streamStatus = $input['StreamStatus'] ?? null;
+        $this->streamName = $input['StreamName'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamName".'));
+        $this->streamArn = $input['StreamARN'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamARN".'));
+        $this->streamStatus = $input['StreamStatus'] ?? $this->throwException(new InvalidArgument('Missing required field "StreamStatus".'));
         $this->streamModeDetails = isset($input['StreamModeDetails']) ? StreamModeDetails::create($input['StreamModeDetails']) : null;
         $this->streamCreationTimestamp = $input['StreamCreationTimestamp'] ?? null;
     }
@@ -90,4 +91,12 @@ public function getStreamStatus(): string
     {
         return $this->streamStatus;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kinesis/src/ValueObject/Tag.php b/src/Service/Kinesis/src/ValueObject/Tag.php
index 12ef5739c..720854963 100644
--- a/src/Service/Kinesis/src/ValueObject/Tag.php
+++ b/src/Service/Kinesis/src/ValueObject/Tag.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Kinesis\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Metadata assigned to the stream, consisting of a key-value pair.
  */
@@ -27,7 +29,7 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
         $this->value = $input['Value'] ?? null;
     }
 
@@ -51,4 +53,12 @@ public function getValue(): ?string
     {
         return $this->value;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kms/src/ValueObject/KeyMetadata.php b/src/Service/Kms/src/ValueObject/KeyMetadata.php
index 5498ba240..b1b05913e 100644
--- a/src/Service/Kms/src/ValueObject/KeyMetadata.php
+++ b/src/Service/Kms/src/ValueObject/KeyMetadata.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Kms\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Kms\Enum\CustomerMasterKeySpec;
 use AsyncAws\Kms\Enum\EncryptionAlgorithmSpec;
 use AsyncAws\Kms\Enum\ExpirationModelType;
@@ -241,7 +242,7 @@ final class KeyMetadata
     public function __construct(array $input)
     {
         $this->awsAccountId = $input['AWSAccountId'] ?? null;
-        $this->keyId = $input['KeyId'] ?? null;
+        $this->keyId = $input['KeyId'] ?? $this->throwException(new InvalidArgument('Missing required field "KeyId".'));
         $this->arn = $input['Arn'] ?? null;
         $this->creationDate = $input['CreationDate'] ?? null;
         $this->enabled = $input['Enabled'] ?? null;
@@ -452,4 +453,12 @@ public function getXksKeyConfiguration(): ?XksKeyConfigurationType
     {
         return $this->xksKeyConfiguration;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Kms/src/ValueObject/Tag.php b/src/Service/Kms/src/ValueObject/Tag.php
index 24db158f2..372b613d0 100644
--- a/src/Service/Kms/src/ValueObject/Tag.php
+++ b/src/Service/Kms/src/ValueObject/Tag.php
@@ -36,8 +36,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->tagKey = $input['TagKey'] ?? null;
-        $this->tagValue = $input['TagValue'] ?? null;
+        $this->tagKey = $input['TagKey'] ?? $this->throwException(new InvalidArgument('Missing required field "TagKey".'));
+        $this->tagValue = $input['TagValue'] ?? $this->throwException(new InvalidArgument('Missing required field "TagValue".'));
     }
 
     /**
@@ -67,15 +67,19 @@ public function getTagValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->tagKey) {
-            throw new InvalidArgument(sprintf('Missing parameter "TagKey" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tagKey;
         $payload['TagKey'] = $v;
-        if (null === $v = $this->tagValue) {
-            throw new InvalidArgument(sprintf('Missing parameter "TagValue" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tagValue;
         $payload['TagValue'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Lambda/src/ValueObject/EphemeralStorage.php b/src/Service/Lambda/src/ValueObject/EphemeralStorage.php
index ef6adf2ff..9fe9673d8 100644
--- a/src/Service/Lambda/src/ValueObject/EphemeralStorage.php
+++ b/src/Service/Lambda/src/ValueObject/EphemeralStorage.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Lambda\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The size of the function's `/tmp` directory in MB. The default value is 512, but it can be any whole number between
  * 512 and 10,240 MB.
@@ -20,7 +22,7 @@ final class EphemeralStorage
      */
     public function __construct(array $input)
     {
-        $this->size = $input['Size'] ?? null;
+        $this->size = $input['Size'] ?? $this->throwException(new InvalidArgument('Missing required field "Size".'));
     }
 
     /**
@@ -37,4 +39,12 @@ public function getSize(): int
     {
         return $this->size;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Lambda/src/ValueObject/FileSystemConfig.php b/src/Service/Lambda/src/ValueObject/FileSystemConfig.php
index e0c12f3db..f5e6d48cd 100644
--- a/src/Service/Lambda/src/ValueObject/FileSystemConfig.php
+++ b/src/Service/Lambda/src/ValueObject/FileSystemConfig.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Lambda\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Details about the connection between a Lambda function and an Amazon EFS file system [^1].
  *
@@ -27,8 +29,8 @@ final class FileSystemConfig
      */
     public function __construct(array $input)
     {
-        $this->arn = $input['Arn'] ?? null;
-        $this->localMountPath = $input['LocalMountPath'] ?? null;
+        $this->arn = $input['Arn'] ?? $this->throwException(new InvalidArgument('Missing required field "Arn".'));
+        $this->localMountPath = $input['LocalMountPath'] ?? $this->throwException(new InvalidArgument('Missing required field "LocalMountPath".'));
     }
 
     /**
@@ -51,4 +53,12 @@ public function getLocalMountPath(): string
     {
         return $this->localMountPath;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/MediaConvert/src/ValueObject/AccelerationSettings.php b/src/Service/MediaConvert/src/ValueObject/AccelerationSettings.php
index 53c0ab7d6..c710bfd82 100644
--- a/src/Service/MediaConvert/src/ValueObject/AccelerationSettings.php
+++ b/src/Service/MediaConvert/src/ValueObject/AccelerationSettings.php
@@ -22,7 +22,7 @@ final class AccelerationSettings
      */
     public function __construct(array $input)
     {
-        $this->mode = $input['Mode'] ?? null;
+        $this->mode = $input['Mode'] ?? $this->throwException(new InvalidArgument('Missing required field "Mode".'));
     }
 
     /**
@@ -49,9 +49,7 @@ public function getMode(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->mode) {
-            throw new InvalidArgument(sprintf('Missing parameter "Mode" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->mode;
         if (!AccelerationMode::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "mode" for "%s". The value "%s" is not a valid "AccelerationMode".', __CLASS__, $v));
         }
@@ -59,4 +57,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/MediaConvert/src/ValueObject/Job.php b/src/Service/MediaConvert/src/ValueObject/Job.php
index f8f86b6ab..0c3b435b0 100644
--- a/src/Service/MediaConvert/src/ValueObject/Job.php
+++ b/src/Service/MediaConvert/src/ValueObject/Job.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\MediaConvert\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\MediaConvert\Enum\AccelerationStatus;
 use AsyncAws\MediaConvert\Enum\BillingTagsSource;
 use AsyncAws\MediaConvert\Enum\JobPhase;
@@ -226,8 +227,8 @@ public function __construct(array $input)
         $this->queue = $input['Queue'] ?? null;
         $this->queueTransitions = isset($input['QueueTransitions']) ? array_map([QueueTransition::class, 'create'], $input['QueueTransitions']) : null;
         $this->retryCount = $input['RetryCount'] ?? null;
-        $this->role = $input['Role'] ?? null;
-        $this->settings = isset($input['Settings']) ? JobSettings::create($input['Settings']) : null;
+        $this->role = $input['Role'] ?? $this->throwException(new InvalidArgument('Missing required field "Role".'));
+        $this->settings = isset($input['Settings']) ? JobSettings::create($input['Settings']) : $this->throwException(new InvalidArgument('Missing required field "Settings".'));
         $this->simulateReservedQueue = $input['SimulateReservedQueue'] ?? null;
         $this->status = $input['Status'] ?? null;
         $this->statusUpdateInterval = $input['StatusUpdateInterval'] ?? null;
@@ -439,4 +440,12 @@ public function getWarnings(): array
     {
         return $this->warnings ?? [];
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/MediaConvert/src/ValueObject/WarningGroup.php b/src/Service/MediaConvert/src/ValueObject/WarningGroup.php
index 1067fddb0..3f273f9b5 100644
--- a/src/Service/MediaConvert/src/ValueObject/WarningGroup.php
+++ b/src/Service/MediaConvert/src/ValueObject/WarningGroup.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\MediaConvert\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains any warning codes and their count for the job.
  */
@@ -26,8 +28,8 @@ final class WarningGroup
      */
     public function __construct(array $input)
     {
-        $this->code = $input['Code'] ?? null;
-        $this->count = $input['Count'] ?? null;
+        $this->code = $input['Code'] ?? $this->throwException(new InvalidArgument('Missing required field "Code".'));
+        $this->count = $input['Count'] ?? $this->throwException(new InvalidArgument('Missing required field "Count".'));
     }
 
     /**
@@ -50,4 +52,12 @@ public function getCount(): int
     {
         return $this->count;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Rekognition/src/ValueObject/HumanLoopConfig.php b/src/Service/Rekognition/src/ValueObject/HumanLoopConfig.php
index 6a869b70c..80db499b2 100644
--- a/src/Service/Rekognition/src/ValueObject/HumanLoopConfig.php
+++ b/src/Service/Rekognition/src/ValueObject/HumanLoopConfig.php
@@ -37,8 +37,8 @@ final class HumanLoopConfig
      */
     public function __construct(array $input)
     {
-        $this->humanLoopName = $input['HumanLoopName'] ?? null;
-        $this->flowDefinitionArn = $input['FlowDefinitionArn'] ?? null;
+        $this->humanLoopName = $input['HumanLoopName'] ?? $this->throwException(new InvalidArgument('Missing required field "HumanLoopName".'));
+        $this->flowDefinitionArn = $input['FlowDefinitionArn'] ?? $this->throwException(new InvalidArgument('Missing required field "FlowDefinitionArn".'));
         $this->dataAttributes = isset($input['DataAttributes']) ? HumanLoopDataAttributes::create($input['DataAttributes']) : null;
     }
 
@@ -75,13 +75,9 @@ public function getHumanLoopName(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->humanLoopName) {
-            throw new InvalidArgument(sprintf('Missing parameter "HumanLoopName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->humanLoopName;
         $payload['HumanLoopName'] = $v;
-        if (null === $v = $this->flowDefinitionArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "FlowDefinitionArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->flowDefinitionArn;
         $payload['FlowDefinitionArn'] = $v;
         if (null !== $v = $this->dataAttributes) {
             $payload['DataAttributes'] = $v->requestBody();
@@ -89,4 +85,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/AliasTarget.php b/src/Service/Route53/src/ValueObject/AliasTarget.php
index 339925bc5..0c74531f7 100644
--- a/src/Service/Route53/src/ValueObject/AliasTarget.php
+++ b/src/Service/Route53/src/ValueObject/AliasTarget.php
@@ -282,9 +282,9 @@ final class AliasTarget
      */
     public function __construct(array $input)
     {
-        $this->hostedZoneId = $input['HostedZoneId'] ?? null;
-        $this->dnsName = $input['DNSName'] ?? null;
-        $this->evaluateTargetHealth = $input['EvaluateTargetHealth'] ?? null;
+        $this->hostedZoneId = $input['HostedZoneId'] ?? $this->throwException(new InvalidArgument('Missing required field "HostedZoneId".'));
+        $this->dnsName = $input['DNSName'] ?? $this->throwException(new InvalidArgument('Missing required field "DNSName".'));
+        $this->evaluateTargetHealth = $input['EvaluateTargetHealth'] ?? $this->throwException(new InvalidArgument('Missing required field "EvaluateTargetHealth".'));
     }
 
     /**
@@ -319,17 +319,19 @@ public function getHostedZoneId(): string
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->hostedZoneId) {
-            throw new InvalidArgument(sprintf('Missing parameter "HostedZoneId" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->hostedZoneId;
         $node->appendChild($document->createElement('HostedZoneId', $v));
-        if (null === $v = $this->dnsName) {
-            throw new InvalidArgument(sprintf('Missing parameter "DNSName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->dnsName;
         $node->appendChild($document->createElement('DNSName', $v));
-        if (null === $v = $this->evaluateTargetHealth) {
-            throw new InvalidArgument(sprintf('Missing parameter "EvaluateTargetHealth" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->evaluateTargetHealth;
         $node->appendChild($document->createElement('EvaluateTargetHealth', $v ? 'true' : 'false'));
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/Change.php b/src/Service/Route53/src/ValueObject/Change.php
index e8ca22f3a..ac3214a7b 100644
--- a/src/Service/Route53/src/ValueObject/Change.php
+++ b/src/Service/Route53/src/ValueObject/Change.php
@@ -41,8 +41,8 @@ final class Change
      */
     public function __construct(array $input)
     {
-        $this->action = $input['Action'] ?? null;
-        $this->resourceRecordSet = isset($input['ResourceRecordSet']) ? ResourceRecordSet::create($input['ResourceRecordSet']) : null;
+        $this->action = $input['Action'] ?? $this->throwException(new InvalidArgument('Missing required field "Action".'));
+        $this->resourceRecordSet = isset($input['ResourceRecordSet']) ? ResourceRecordSet::create($input['ResourceRecordSet']) : $this->throwException(new InvalidArgument('Missing required field "ResourceRecordSet".'));
     }
 
     /**
@@ -74,19 +74,23 @@ public function getResourceRecordSet(): ResourceRecordSet
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->action) {
-            throw new InvalidArgument(sprintf('Missing parameter "Action" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->action;
         if (!ChangeAction::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "Action" for "%s". The value "%s" is not a valid "ChangeAction".', __CLASS__, $v));
         }
         $node->appendChild($document->createElement('Action', $v));
-        if (null === $v = $this->resourceRecordSet) {
-            throw new InvalidArgument(sprintf('Missing parameter "ResourceRecordSet" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->resourceRecordSet;
 
         $node->appendChild($child = $document->createElement('ResourceRecordSet'));
 
         $v->requestBody($child, $document);
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/ChangeBatch.php b/src/Service/Route53/src/ValueObject/ChangeBatch.php
index a8981657d..0e2b7f9cd 100644
--- a/src/Service/Route53/src/ValueObject/ChangeBatch.php
+++ b/src/Service/Route53/src/ValueObject/ChangeBatch.php
@@ -28,7 +28,7 @@ final class ChangeBatch
     public function __construct(array $input)
     {
         $this->comment = $input['Comment'] ?? null;
-        $this->changes = isset($input['Changes']) ? array_map([Change::class, 'create'], $input['Changes']) : null;
+        $this->changes = isset($input['Changes']) ? array_map([Change::class, 'create'], $input['Changes']) : $this->throwException(new InvalidArgument('Missing required field "Changes".'));
     }
 
     /**
@@ -47,7 +47,7 @@ public static function create($input): self
      */
     public function getChanges(): array
     {
-        return $this->changes ?? [];
+        return $this->changes;
     }
 
     public function getComment(): ?string
@@ -63,9 +63,7 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
         if (null !== $v = $this->comment) {
             $node->appendChild($document->createElement('Comment', $v));
         }
-        if (null === $v = $this->changes) {
-            throw new InvalidArgument(sprintf('Missing parameter "Changes" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->changes;
 
         $node->appendChild($nodeList = $document->createElement('Changes'));
         foreach ($v as $item) {
@@ -74,4 +72,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $item->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/ChangeInfo.php b/src/Service/Route53/src/ValueObject/ChangeInfo.php
index aaa94a198..ef60fb295 100644
--- a/src/Service/Route53/src/ValueObject/ChangeInfo.php
+++ b/src/Service/Route53/src/ValueObject/ChangeInfo.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\Route53\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\Route53\Enum\ChangeStatus;
 
 /**
@@ -46,9 +47,9 @@ final class ChangeInfo
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->status = $input['Status'] ?? null;
-        $this->submittedAt = $input['SubmittedAt'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->status = $input['Status'] ?? $this->throwException(new InvalidArgument('Missing required field "Status".'));
+        $this->submittedAt = $input['SubmittedAt'] ?? $this->throwException(new InvalidArgument('Missing required field "SubmittedAt".'));
         $this->comment = $input['Comment'] ?? null;
     }
 
@@ -87,4 +88,12 @@ public function getSubmittedAt(): \DateTimeImmutable
     {
         return $this->submittedAt;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/CidrRoutingConfig.php b/src/Service/Route53/src/ValueObject/CidrRoutingConfig.php
index 918195cf7..8fc760f12 100644
--- a/src/Service/Route53/src/ValueObject/CidrRoutingConfig.php
+++ b/src/Service/Route53/src/ValueObject/CidrRoutingConfig.php
@@ -31,8 +31,8 @@ final class CidrRoutingConfig
      */
     public function __construct(array $input)
     {
-        $this->collectionId = $input['CollectionId'] ?? null;
-        $this->locationName = $input['LocationName'] ?? null;
+        $this->collectionId = $input['CollectionId'] ?? $this->throwException(new InvalidArgument('Missing required field "CollectionId".'));
+        $this->locationName = $input['LocationName'] ?? $this->throwException(new InvalidArgument('Missing required field "LocationName".'));
     }
 
     /**
@@ -61,13 +61,17 @@ public function getLocationName(): string
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->collectionId) {
-            throw new InvalidArgument(sprintf('Missing parameter "CollectionId" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->collectionId;
         $node->appendChild($document->createElement('CollectionId', $v));
-        if (null === $v = $this->locationName) {
-            throw new InvalidArgument(sprintf('Missing parameter "LocationName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->locationName;
         $node->appendChild($document->createElement('LocationName', $v));
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/DelegationSet.php b/src/Service/Route53/src/ValueObject/DelegationSet.php
index 8a9aeb576..2735da282 100644
--- a/src/Service/Route53/src/ValueObject/DelegationSet.php
+++ b/src/Service/Route53/src/ValueObject/DelegationSet.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Route53\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * A complex type that lists the name servers in a delegation set, as well as the `CallerReference` and the `ID` for the
  * delegation set.
@@ -35,7 +37,7 @@ public function __construct(array $input)
     {
         $this->id = $input['Id'] ?? null;
         $this->callerReference = $input['CallerReference'] ?? null;
-        $this->nameServers = $input['NameServers'] ?? null;
+        $this->nameServers = $input['NameServers'] ?? $this->throwException(new InvalidArgument('Missing required field "NameServers".'));
     }
 
     /**
@@ -65,6 +67,14 @@ public function getId(): ?string
      */
     public function getNameServers(): array
     {
-        return $this->nameServers ?? [];
+        return $this->nameServers;
+    }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
     }
 }
diff --git a/src/Service/Route53/src/ValueObject/HostedZone.php b/src/Service/Route53/src/ValueObject/HostedZone.php
index e8c651996..a33a46dfd 100644
--- a/src/Service/Route53/src/ValueObject/HostedZone.php
+++ b/src/Service/Route53/src/ValueObject/HostedZone.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Route53\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * A complex type that contains general information about the hosted zone.
  */
@@ -56,9 +58,9 @@ final class HostedZone
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->name = $input['Name'] ?? null;
-        $this->callerReference = $input['CallerReference'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->callerReference = $input['CallerReference'] ?? $this->throwException(new InvalidArgument('Missing required field "CallerReference".'));
         $this->config = isset($input['Config']) ? HostedZoneConfig::create($input['Config']) : null;
         $this->resourceRecordSetCount = $input['ResourceRecordSetCount'] ?? null;
         $this->linkedService = isset($input['LinkedService']) ? LinkedService::create($input['LinkedService']) : null;
@@ -108,4 +110,12 @@ public function getResourceRecordSetCount(): ?int
     {
         return $this->resourceRecordSetCount;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/ResourceRecord.php b/src/Service/Route53/src/ValueObject/ResourceRecord.php
index f7160203c..dfc33f509 100644
--- a/src/Service/Route53/src/ValueObject/ResourceRecord.php
+++ b/src/Service/Route53/src/ValueObject/ResourceRecord.php
@@ -31,7 +31,7 @@ final class ResourceRecord
      */
     public function __construct(array $input)
     {
-        $this->value = $input['Value'] ?? null;
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -54,9 +54,15 @@ public function getValue(): string
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $node->appendChild($document->createElement('Value', $v));
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Route53/src/ValueObject/ResourceRecordSet.php b/src/Service/Route53/src/ValueObject/ResourceRecordSet.php
index e9e51158a..b25d29ed5 100644
--- a/src/Service/Route53/src/ValueObject/ResourceRecordSet.php
+++ b/src/Service/Route53/src/ValueObject/ResourceRecordSet.php
@@ -400,8 +400,8 @@ final class ResourceRecordSet
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->type = $input['Type'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
         $this->setIdentifier = $input['SetIdentifier'] ?? null;
         $this->weight = $input['Weight'] ?? null;
         $this->region = $input['Region'] ?? null;
@@ -526,13 +526,9 @@ public function getWeight(): ?int
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $node->appendChild($document->createElement('Name', $v));
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "Type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!RRType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "Type" for "%s". The value "%s" is not a valid "RRType".', __CLASS__, $v));
         }
@@ -591,4 +587,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $v->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/CORSConfiguration.php b/src/Service/S3/src/ValueObject/CORSConfiguration.php
index 78a8bd006..39a8c57cc 100644
--- a/src/Service/S3/src/ValueObject/CORSConfiguration.php
+++ b/src/Service/S3/src/ValueObject/CORSConfiguration.php
@@ -25,7 +25,7 @@ final class CORSConfiguration
      */
     public function __construct(array $input)
     {
-        $this->corsRules = isset($input['CORSRules']) ? array_map([CORSRule::class, 'create'], $input['CORSRules']) : null;
+        $this->corsRules = isset($input['CORSRules']) ? array_map([CORSRule::class, 'create'], $input['CORSRules']) : $this->throwException(new InvalidArgument('Missing required field "CORSRules".'));
     }
 
     /**
@@ -43,7 +43,7 @@ public static function create($input): self
      */
     public function getCorsRules(): array
     {
-        return $this->corsRules ?? [];
+        return $this->corsRules;
     }
 
     /**
@@ -51,13 +51,19 @@ public function getCorsRules(): array
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->corsRules) {
-            throw new InvalidArgument(sprintf('Missing parameter "CORSRules" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->corsRules;
         foreach ($v as $item) {
             $node->appendChild($child = $document->createElement('CORSRule'));
 
             $item->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/CORSRule.php b/src/Service/S3/src/ValueObject/CORSRule.php
index 7ba5f3c61..1e14a3f73 100644
--- a/src/Service/S3/src/ValueObject/CORSRule.php
+++ b/src/Service/S3/src/ValueObject/CORSRule.php
@@ -56,8 +56,8 @@ public function __construct(array $input)
     {
         $this->id = $input['ID'] ?? null;
         $this->allowedHeaders = $input['AllowedHeaders'] ?? null;
-        $this->allowedMethods = $input['AllowedMethods'] ?? null;
-        $this->allowedOrigins = $input['AllowedOrigins'] ?? null;
+        $this->allowedMethods = $input['AllowedMethods'] ?? $this->throwException(new InvalidArgument('Missing required field "AllowedMethods".'));
+        $this->allowedOrigins = $input['AllowedOrigins'] ?? $this->throwException(new InvalidArgument('Missing required field "AllowedOrigins".'));
         $this->exposeHeaders = $input['ExposeHeaders'] ?? null;
         $this->maxAgeSeconds = $input['MaxAgeSeconds'] ?? null;
     }
@@ -90,7 +90,7 @@ public function getAllowedHeaders(): array
      */
     public function getAllowedMethods(): array
     {
-        return $this->allowedMethods ?? [];
+        return $this->allowedMethods;
     }
 
     /**
@@ -98,7 +98,7 @@ public function getAllowedMethods(): array
      */
     public function getAllowedOrigins(): array
     {
-        return $this->allowedOrigins ?? [];
+        return $this->allowedOrigins;
     }
 
     /**
@@ -132,16 +132,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
                 $node->appendChild($document->createElement('AllowedHeader', $item));
             }
         }
-        if (null === $v = $this->allowedMethods) {
-            throw new InvalidArgument(sprintf('Missing parameter "AllowedMethods" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->allowedMethods;
         foreach ($v as $item) {
             $node->appendChild($document->createElement('AllowedMethod', $item));
         }
 
-        if (null === $v = $this->allowedOrigins) {
-            throw new InvalidArgument(sprintf('Missing parameter "AllowedOrigins" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->allowedOrigins;
         foreach ($v as $item) {
             $node->appendChild($document->createElement('AllowedOrigin', $item));
         }
@@ -155,4 +151,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $node->appendChild($document->createElement('MaxAgeSeconds', (string) $v));
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/Delete.php b/src/Service/S3/src/ValueObject/Delete.php
index bf0f0b322..9808c3555 100644
--- a/src/Service/S3/src/ValueObject/Delete.php
+++ b/src/Service/S3/src/ValueObject/Delete.php
@@ -27,7 +27,7 @@ final class Delete
      */
     public function __construct(array $input)
     {
-        $this->objects = isset($input['Objects']) ? array_map([ObjectIdentifier::class, 'create'], $input['Objects']) : null;
+        $this->objects = isset($input['Objects']) ? array_map([ObjectIdentifier::class, 'create'], $input['Objects']) : $this->throwException(new InvalidArgument('Missing required field "Objects".'));
         $this->quiet = $input['Quiet'] ?? null;
     }
 
@@ -47,7 +47,7 @@ public static function create($input): self
      */
     public function getObjects(): array
     {
-        return $this->objects ?? [];
+        return $this->objects;
     }
 
     public function getQuiet(): ?bool
@@ -60,9 +60,7 @@ public function getQuiet(): ?bool
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->objects) {
-            throw new InvalidArgument(sprintf('Missing parameter "Objects" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->objects;
         foreach ($v as $item) {
             $node->appendChild($child = $document->createElement('Object'));
 
@@ -73,4 +71,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $node->appendChild($document->createElement('Quiet', $v ? 'true' : 'false'));
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/Grantee.php b/src/Service/S3/src/ValueObject/Grantee.php
index ed79eec72..7d8e269ac 100644
--- a/src/Service/S3/src/ValueObject/Grantee.php
+++ b/src/Service/S3/src/ValueObject/Grantee.php
@@ -65,7 +65,7 @@ public function __construct(array $input)
         $this->displayName = $input['DisplayName'] ?? null;
         $this->emailAddress = $input['EmailAddress'] ?? null;
         $this->id = $input['ID'] ?? null;
-        $this->type = $input['Type'] ?? null;
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
         $this->uri = $input['URI'] ?? null;
     }
 
@@ -125,9 +125,7 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
         if (null !== $v = $this->id) {
             $node->appendChild($document->createElement('ID', $v));
         }
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "Type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!Type::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "xsi:type" for "%s". The value "%s" is not a valid "Type".', __CLASS__, $v));
         }
@@ -136,4 +134,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $node->appendChild($document->createElement('URI', $v));
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/LambdaFunctionConfiguration.php b/src/Service/S3/src/ValueObject/LambdaFunctionConfiguration.php
index 94d616826..9f7a44345 100644
--- a/src/Service/S3/src/ValueObject/LambdaFunctionConfiguration.php
+++ b/src/Service/S3/src/ValueObject/LambdaFunctionConfiguration.php
@@ -38,8 +38,8 @@ final class LambdaFunctionConfiguration
     public function __construct(array $input)
     {
         $this->id = $input['Id'] ?? null;
-        $this->lambdaFunctionArn = $input['LambdaFunctionArn'] ?? null;
-        $this->events = $input['Events'] ?? null;
+        $this->lambdaFunctionArn = $input['LambdaFunctionArn'] ?? $this->throwException(new InvalidArgument('Missing required field "LambdaFunctionArn".'));
+        $this->events = $input['Events'] ?? $this->throwException(new InvalidArgument('Missing required field "Events".'));
         $this->filter = isset($input['Filter']) ? NotificationConfigurationFilter::create($input['Filter']) : null;
     }
 
@@ -61,7 +61,7 @@ public static function create($input): self
      */
     public function getEvents(): array
     {
-        return $this->events ?? [];
+        return $this->events;
     }
 
     public function getFilter(): ?NotificationConfigurationFilter
@@ -87,13 +87,9 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
         if (null !== $v = $this->id) {
             $node->appendChild($document->createElement('Id', $v));
         }
-        if (null === $v = $this->lambdaFunctionArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "LambdaFunctionArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->lambdaFunctionArn;
         $node->appendChild($document->createElement('CloudFunction', $v));
-        if (null === $v = $this->events) {
-            throw new InvalidArgument(sprintf('Missing parameter "Events" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->events;
         foreach ($v as $item) {
             if (!Event::exists($item)) {
                 throw new InvalidArgument(sprintf('Invalid parameter "Event" for "%s". The value "%s" is not a valid "Event".', __CLASS__, $item));
@@ -107,4 +103,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $v->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/ObjectIdentifier.php b/src/Service/S3/src/ValueObject/ObjectIdentifier.php
index 7b5a90df4..4b7a150f1 100644
--- a/src/Service/S3/src/ValueObject/ObjectIdentifier.php
+++ b/src/Service/S3/src/ValueObject/ObjectIdentifier.php
@@ -32,7 +32,7 @@ final class ObjectIdentifier
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
         $this->versionId = $input['VersionId'] ?? null;
     }
 
@@ -62,12 +62,18 @@ public function getVersionId(): ?string
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $node->appendChild($document->createElement('Key', $v));
         if (null !== $v = $this->versionId) {
             $node->appendChild($document->createElement('VersionId', $v));
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/QueueConfiguration.php b/src/Service/S3/src/ValueObject/QueueConfiguration.php
index fce17c54a..3dc5694bb 100644
--- a/src/Service/S3/src/ValueObject/QueueConfiguration.php
+++ b/src/Service/S3/src/ValueObject/QueueConfiguration.php
@@ -37,8 +37,8 @@ final class QueueConfiguration
     public function __construct(array $input)
     {
         $this->id = $input['Id'] ?? null;
-        $this->queueArn = $input['QueueArn'] ?? null;
-        $this->events = $input['Events'] ?? null;
+        $this->queueArn = $input['QueueArn'] ?? $this->throwException(new InvalidArgument('Missing required field "QueueArn".'));
+        $this->events = $input['Events'] ?? $this->throwException(new InvalidArgument('Missing required field "Events".'));
         $this->filter = isset($input['Filter']) ? NotificationConfigurationFilter::create($input['Filter']) : null;
     }
 
@@ -60,7 +60,7 @@ public static function create($input): self
      */
     public function getEvents(): array
     {
-        return $this->events ?? [];
+        return $this->events;
     }
 
     public function getFilter(): ?NotificationConfigurationFilter
@@ -86,13 +86,9 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
         if (null !== $v = $this->id) {
             $node->appendChild($document->createElement('Id', $v));
         }
-        if (null === $v = $this->queueArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "QueueArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->queueArn;
         $node->appendChild($document->createElement('Queue', $v));
-        if (null === $v = $this->events) {
-            throw new InvalidArgument(sprintf('Missing parameter "Events" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->events;
         foreach ($v as $item) {
             if (!Event::exists($item)) {
                 throw new InvalidArgument(sprintf('Invalid parameter "Event" for "%s". The value "%s" is not a valid "Event".', __CLASS__, $item));
@@ -106,4 +102,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $v->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/ServerSideEncryptionByDefault.php b/src/Service/S3/src/ValueObject/ServerSideEncryptionByDefault.php
index c2adab5b3..186fd138f 100644
--- a/src/Service/S3/src/ValueObject/ServerSideEncryptionByDefault.php
+++ b/src/Service/S3/src/ValueObject/ServerSideEncryptionByDefault.php
@@ -2,6 +2,7 @@
 
 namespace AsyncAws\S3\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
 use AsyncAws\S3\Enum\ServerSideEncryption;
 
 /**
@@ -49,7 +50,7 @@ final class ServerSideEncryptionByDefault
      */
     public function __construct(array $input)
     {
-        $this->sseAlgorithm = $input['SSEAlgorithm'] ?? null;
+        $this->sseAlgorithm = $input['SSEAlgorithm'] ?? $this->throwException(new InvalidArgument('Missing required field "SSEAlgorithm".'));
         $this->kmsMasterKeyId = $input['KMSMasterKeyID'] ?? null;
     }
 
@@ -76,4 +77,12 @@ public function getSseAlgorithm(): string
     {
         return $this->sseAlgorithm;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/ServerSideEncryptionConfiguration.php b/src/Service/S3/src/ValueObject/ServerSideEncryptionConfiguration.php
index f5d1d9eed..f5035ea73 100644
--- a/src/Service/S3/src/ValueObject/ServerSideEncryptionConfiguration.php
+++ b/src/Service/S3/src/ValueObject/ServerSideEncryptionConfiguration.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\S3\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Specifies the default server-side-encryption configuration.
  */
@@ -19,7 +21,7 @@ final class ServerSideEncryptionConfiguration
      */
     public function __construct(array $input)
     {
-        $this->rules = isset($input['Rules']) ? array_map([ServerSideEncryptionRule::class, 'create'], $input['Rules']) : null;
+        $this->rules = isset($input['Rules']) ? array_map([ServerSideEncryptionRule::class, 'create'], $input['Rules']) : $this->throwException(new InvalidArgument('Missing required field "Rules".'));
     }
 
     /**
@@ -37,6 +39,14 @@ public static function create($input): self
      */
     public function getRules(): array
     {
-        return $this->rules ?? [];
+        return $this->rules;
+    }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
     }
 }
diff --git a/src/Service/S3/src/ValueObject/Tag.php b/src/Service/S3/src/ValueObject/Tag.php
index 64b34ec8e..3cc4c19eb 100644
--- a/src/Service/S3/src/ValueObject/Tag.php
+++ b/src/Service/S3/src/ValueObject/Tag.php
@@ -27,8 +27,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -57,13 +57,17 @@ public function getValue(): string
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $node->appendChild($document->createElement('Key', $v));
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $node->appendChild($document->createElement('Value', $v));
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/Tagging.php b/src/Service/S3/src/ValueObject/Tagging.php
index f6a5e8614..25fdddf4c 100644
--- a/src/Service/S3/src/ValueObject/Tagging.php
+++ b/src/Service/S3/src/ValueObject/Tagging.php
@@ -21,7 +21,7 @@ final class Tagging
      */
     public function __construct(array $input)
     {
-        $this->tagSet = isset($input['TagSet']) ? array_map([Tag::class, 'create'], $input['TagSet']) : null;
+        $this->tagSet = isset($input['TagSet']) ? array_map([Tag::class, 'create'], $input['TagSet']) : $this->throwException(new InvalidArgument('Missing required field "TagSet".'));
     }
 
     /**
@@ -39,7 +39,7 @@ public static function create($input): self
      */
     public function getTagSet(): array
     {
-        return $this->tagSet ?? [];
+        return $this->tagSet;
     }
 
     /**
@@ -47,9 +47,7 @@ public function getTagSet(): array
      */
     public function requestBody(\DOMElement $node, \DOMDocument $document): void
     {
-        if (null === $v = $this->tagSet) {
-            throw new InvalidArgument(sprintf('Missing parameter "TagSet" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->tagSet;
 
         $node->appendChild($nodeList = $document->createElement('TagSet'));
         foreach ($v as $item) {
@@ -58,4 +56,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $item->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/S3/src/ValueObject/TopicConfiguration.php b/src/Service/S3/src/ValueObject/TopicConfiguration.php
index 06dc19bba..ae4f4ef31 100644
--- a/src/Service/S3/src/ValueObject/TopicConfiguration.php
+++ b/src/Service/S3/src/ValueObject/TopicConfiguration.php
@@ -40,8 +40,8 @@ final class TopicConfiguration
     public function __construct(array $input)
     {
         $this->id = $input['Id'] ?? null;
-        $this->topicArn = $input['TopicArn'] ?? null;
-        $this->events = $input['Events'] ?? null;
+        $this->topicArn = $input['TopicArn'] ?? $this->throwException(new InvalidArgument('Missing required field "TopicArn".'));
+        $this->events = $input['Events'] ?? $this->throwException(new InvalidArgument('Missing required field "Events".'));
         $this->filter = isset($input['Filter']) ? NotificationConfigurationFilter::create($input['Filter']) : null;
     }
 
@@ -63,7 +63,7 @@ public static function create($input): self
      */
     public function getEvents(): array
     {
-        return $this->events ?? [];
+        return $this->events;
     }
 
     public function getFilter(): ?NotificationConfigurationFilter
@@ -89,13 +89,9 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
         if (null !== $v = $this->id) {
             $node->appendChild($document->createElement('Id', $v));
         }
-        if (null === $v = $this->topicArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "TopicArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->topicArn;
         $node->appendChild($document->createElement('Topic', $v));
-        if (null === $v = $this->events) {
-            throw new InvalidArgument(sprintf('Missing parameter "Events" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->events;
         foreach ($v as $item) {
             if (!Event::exists($item)) {
                 throw new InvalidArgument(sprintf('Invalid parameter "Event" for "%s". The value "%s" is not a valid "Event".', __CLASS__, $item));
@@ -109,4 +105,12 @@ public function requestBody(\DOMElement $node, \DOMDocument $document): void
             $v->requestBody($child, $document);
         }
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/AwsVpcConfiguration.php b/src/Service/Scheduler/src/ValueObject/AwsVpcConfiguration.php
index dd7f1d5d6..24cccfdb6 100644
--- a/src/Service/Scheduler/src/ValueObject/AwsVpcConfiguration.php
+++ b/src/Service/Scheduler/src/ValueObject/AwsVpcConfiguration.php
@@ -41,7 +41,7 @@ public function __construct(array $input)
     {
         $this->assignPublicIp = $input['AssignPublicIp'] ?? null;
         $this->securityGroups = $input['SecurityGroups'] ?? null;
-        $this->subnets = $input['Subnets'] ?? null;
+        $this->subnets = $input['Subnets'] ?? $this->throwException(new InvalidArgument('Missing required field "Subnets".'));
     }
 
     /**
@@ -77,7 +77,7 @@ public function getSecurityGroups(): array
      */
     public function getSubnets(): array
     {
-        return $this->subnets ?? [];
+        return $this->subnets;
     }
 
     /**
@@ -100,9 +100,7 @@ public function requestBody(): array
                 $payload['SecurityGroups'][$index] = $listValue;
             }
         }
-        if (null === $v = $this->subnets) {
-            throw new InvalidArgument(sprintf('Missing parameter "Subnets" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->subnets;
 
         $index = -1;
         $payload['Subnets'] = [];
@@ -113,4 +111,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/CapacityProviderStrategyItem.php b/src/Service/Scheduler/src/ValueObject/CapacityProviderStrategyItem.php
index c7615eded..a705d8a29 100644
--- a/src/Service/Scheduler/src/ValueObject/CapacityProviderStrategyItem.php
+++ b/src/Service/Scheduler/src/ValueObject/CapacityProviderStrategyItem.php
@@ -38,7 +38,7 @@ final class CapacityProviderStrategyItem
     public function __construct(array $input)
     {
         $this->base = $input['base'] ?? null;
-        $this->capacityProvider = $input['capacityProvider'] ?? null;
+        $this->capacityProvider = $input['capacityProvider'] ?? $this->throwException(new InvalidArgument('Missing required field "capacityProvider".'));
         $this->weight = $input['weight'] ?? null;
     }
 
@@ -78,9 +78,7 @@ public function requestBody(): array
         if (null !== $v = $this->base) {
             $payload['base'] = $v;
         }
-        if (null === $v = $this->capacityProvider) {
-            throw new InvalidArgument(sprintf('Missing parameter "capacityProvider" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->capacityProvider;
         $payload['capacityProvider'] = $v;
         if (null !== $v = $this->weight) {
             $payload['weight'] = $v;
@@ -88,4 +86,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/EcsParameters.php b/src/Service/Scheduler/src/ValueObject/EcsParameters.php
index 06545e1e4..ad7654257 100644
--- a/src/Service/Scheduler/src/ValueObject/EcsParameters.php
+++ b/src/Service/Scheduler/src/ValueObject/EcsParameters.php
@@ -134,7 +134,7 @@ public function __construct(array $input)
         $this->referenceId = $input['ReferenceId'] ?? null;
         $this->tags = $input['Tags'] ?? null;
         $this->taskCount = $input['TaskCount'] ?? null;
-        $this->taskDefinitionArn = $input['TaskDefinitionArn'] ?? null;
+        $this->taskDefinitionArn = $input['TaskDefinitionArn'] ?? $this->throwException(new InvalidArgument('Missing required field "TaskDefinitionArn".'));
     }
 
     /**
@@ -327,11 +327,17 @@ public function requestBody(): array
         if (null !== $v = $this->taskCount) {
             $payload['TaskCount'] = $v;
         }
-        if (null === $v = $this->taskDefinitionArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "TaskDefinitionArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->taskDefinitionArn;
         $payload['TaskDefinitionArn'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/EventBridgeParameters.php b/src/Service/Scheduler/src/ValueObject/EventBridgeParameters.php
index bb030b47d..592af3612 100644
--- a/src/Service/Scheduler/src/ValueObject/EventBridgeParameters.php
+++ b/src/Service/Scheduler/src/ValueObject/EventBridgeParameters.php
@@ -29,8 +29,8 @@ final class EventBridgeParameters
      */
     public function __construct(array $input)
     {
-        $this->detailType = $input['DetailType'] ?? null;
-        $this->source = $input['Source'] ?? null;
+        $this->detailType = $input['DetailType'] ?? $this->throwException(new InvalidArgument('Missing required field "DetailType".'));
+        $this->source = $input['Source'] ?? $this->throwException(new InvalidArgument('Missing required field "Source".'));
     }
 
     /**
@@ -60,15 +60,19 @@ public function getSource(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->detailType) {
-            throw new InvalidArgument(sprintf('Missing parameter "DetailType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->detailType;
         $payload['DetailType'] = $v;
-        if (null === $v = $this->source) {
-            throw new InvalidArgument(sprintf('Missing parameter "Source" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->source;
         $payload['Source'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/FlexibleTimeWindow.php b/src/Service/Scheduler/src/ValueObject/FlexibleTimeWindow.php
index 2a9ddad56..c0f4e0951 100644
--- a/src/Service/Scheduler/src/ValueObject/FlexibleTimeWindow.php
+++ b/src/Service/Scheduler/src/ValueObject/FlexibleTimeWindow.php
@@ -29,7 +29,7 @@ final class FlexibleTimeWindow
     public function __construct(array $input)
     {
         $this->maximumWindowInMinutes = $input['MaximumWindowInMinutes'] ?? null;
-        $this->mode = $input['Mode'] ?? null;
+        $this->mode = $input['Mode'] ?? $this->throwException(new InvalidArgument('Missing required field "Mode".'));
     }
 
     /**
@@ -65,9 +65,7 @@ public function requestBody(): array
         if (null !== $v = $this->maximumWindowInMinutes) {
             $payload['MaximumWindowInMinutes'] = $v;
         }
-        if (null === $v = $this->mode) {
-            throw new InvalidArgument(sprintf('Missing parameter "Mode" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->mode;
         if (!FlexibleTimeWindowMode::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "Mode" for "%s". The value "%s" is not a valid "FlexibleTimeWindowMode".', __CLASS__, $v));
         }
@@ -75,4 +73,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/KinesisParameters.php b/src/Service/Scheduler/src/ValueObject/KinesisParameters.php
index fd4e4831a..6f1877b3f 100644
--- a/src/Service/Scheduler/src/ValueObject/KinesisParameters.php
+++ b/src/Service/Scheduler/src/ValueObject/KinesisParameters.php
@@ -26,7 +26,7 @@ final class KinesisParameters
      */
     public function __construct(array $input)
     {
-        $this->partitionKey = $input['PartitionKey'] ?? null;
+        $this->partitionKey = $input['PartitionKey'] ?? $this->throwException(new InvalidArgument('Missing required field "PartitionKey".'));
     }
 
     /**
@@ -50,11 +50,17 @@ public function getPartitionKey(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->partitionKey) {
-            throw new InvalidArgument(sprintf('Missing parameter "PartitionKey" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->partitionKey;
         $payload['PartitionKey'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/SageMakerPipelineParameter.php b/src/Service/Scheduler/src/ValueObject/SageMakerPipelineParameter.php
index 09958504a..6bdf510ac 100644
--- a/src/Service/Scheduler/src/ValueObject/SageMakerPipelineParameter.php
+++ b/src/Service/Scheduler/src/ValueObject/SageMakerPipelineParameter.php
@@ -27,8 +27,8 @@ final class SageMakerPipelineParameter
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -58,15 +58,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/Tag.php b/src/Service/Scheduler/src/ValueObject/Tag.php
index 95bf11a57..dba0a1c1c 100644
--- a/src/Service/Scheduler/src/ValueObject/Tag.php
+++ b/src/Service/Scheduler/src/ValueObject/Tag.php
@@ -27,8 +27,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -58,15 +58,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/Target.php b/src/Service/Scheduler/src/ValueObject/Target.php
index ab6990d68..c30b92a9f 100644
--- a/src/Service/Scheduler/src/ValueObject/Target.php
+++ b/src/Service/Scheduler/src/ValueObject/Target.php
@@ -98,14 +98,14 @@ final class Target
      */
     public function __construct(array $input)
     {
-        $this->arn = $input['Arn'] ?? null;
+        $this->arn = $input['Arn'] ?? $this->throwException(new InvalidArgument('Missing required field "Arn".'));
         $this->deadLetterConfig = isset($input['DeadLetterConfig']) ? DeadLetterConfig::create($input['DeadLetterConfig']) : null;
         $this->ecsParameters = isset($input['EcsParameters']) ? EcsParameters::create($input['EcsParameters']) : null;
         $this->eventBridgeParameters = isset($input['EventBridgeParameters']) ? EventBridgeParameters::create($input['EventBridgeParameters']) : null;
         $this->input = $input['Input'] ?? null;
         $this->kinesisParameters = isset($input['KinesisParameters']) ? KinesisParameters::create($input['KinesisParameters']) : null;
         $this->retryPolicy = isset($input['RetryPolicy']) ? RetryPolicy::create($input['RetryPolicy']) : null;
-        $this->roleArn = $input['RoleArn'] ?? null;
+        $this->roleArn = $input['RoleArn'] ?? $this->throwException(new InvalidArgument('Missing required field "RoleArn".'));
         $this->sageMakerPipelineParameters = isset($input['SageMakerPipelineParameters']) ? SageMakerPipelineParameters::create($input['SageMakerPipelineParameters']) : null;
         $this->sqsParameters = isset($input['SqsParameters']) ? SqsParameters::create($input['SqsParameters']) : null;
     }
@@ -185,9 +185,7 @@ public function getSqsParameters(): ?SqsParameters
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->arn) {
-            throw new InvalidArgument(sprintf('Missing parameter "Arn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->arn;
         $payload['Arn'] = $v;
         if (null !== $v = $this->deadLetterConfig) {
             $payload['DeadLetterConfig'] = $v->requestBody();
@@ -207,9 +205,7 @@ public function requestBody(): array
         if (null !== $v = $this->retryPolicy) {
             $payload['RetryPolicy'] = $v->requestBody();
         }
-        if (null === $v = $this->roleArn) {
-            throw new InvalidArgument(sprintf('Missing parameter "RoleArn" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->roleArn;
         $payload['RoleArn'] = $v;
         if (null !== $v = $this->sageMakerPipelineParameters) {
             $payload['SageMakerPipelineParameters'] = $v->requestBody();
@@ -220,4 +216,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Scheduler/src/ValueObject/TargetSummary.php b/src/Service/Scheduler/src/ValueObject/TargetSummary.php
index 9b22a9346..6a0365241 100644
--- a/src/Service/Scheduler/src/ValueObject/TargetSummary.php
+++ b/src/Service/Scheduler/src/ValueObject/TargetSummary.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Scheduler\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The details of a target.
  */
@@ -19,7 +21,7 @@ final class TargetSummary
      */
     public function __construct(array $input)
     {
-        $this->arn = $input['Arn'] ?? null;
+        $this->arn = $input['Arn'] ?? $this->throwException(new InvalidArgument('Missing required field "Arn".'));
     }
 
     /**
@@ -36,4 +38,12 @@ public function getArn(): string
     {
         return $this->arn;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ses/src/ValueObject/Content.php b/src/Service/Ses/src/ValueObject/Content.php
index 74b93a8b2..e1982f823 100644
--- a/src/Service/Ses/src/ValueObject/Content.php
+++ b/src/Service/Ses/src/ValueObject/Content.php
@@ -29,7 +29,7 @@ final class Content
      */
     public function __construct(array $input)
     {
-        $this->data = $input['Data'] ?? null;
+        $this->data = $input['Data'] ?? $this->throwException(new InvalidArgument('Missing required field "Data".'));
         $this->charset = $input['Charset'] ?? null;
     }
 
@@ -60,9 +60,7 @@ public function getData(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->data) {
-            throw new InvalidArgument(sprintf('Missing parameter "Data" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->data;
         $payload['Data'] = $v;
         if (null !== $v = $this->charset) {
             $payload['Charset'] = $v;
@@ -70,4 +68,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ses/src/ValueObject/ListManagementOptions.php b/src/Service/Ses/src/ValueObject/ListManagementOptions.php
index 0e4eead09..4eb235b35 100644
--- a/src/Service/Ses/src/ValueObject/ListManagementOptions.php
+++ b/src/Service/Ses/src/ValueObject/ListManagementOptions.php
@@ -28,7 +28,7 @@ final class ListManagementOptions
      */
     public function __construct(array $input)
     {
-        $this->contactListName = $input['ContactListName'] ?? null;
+        $this->contactListName = $input['ContactListName'] ?? $this->throwException(new InvalidArgument('Missing required field "ContactListName".'));
         $this->topicName = $input['TopicName'] ?? null;
     }
 
@@ -59,9 +59,7 @@ public function getTopicName(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->contactListName) {
-            throw new InvalidArgument(sprintf('Missing parameter "ContactListName" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->contactListName;
         $payload['ContactListName'] = $v;
         if (null !== $v = $this->topicName) {
             $payload['TopicName'] = $v;
@@ -69,4 +67,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ses/src/ValueObject/Message.php b/src/Service/Ses/src/ValueObject/Message.php
index 313fe3600..0435e39ef 100644
--- a/src/Service/Ses/src/ValueObject/Message.php
+++ b/src/Service/Ses/src/ValueObject/Message.php
@@ -30,8 +30,8 @@ final class Message
      */
     public function __construct(array $input)
     {
-        $this->subject = isset($input['Subject']) ? Content::create($input['Subject']) : null;
-        $this->body = isset($input['Body']) ? Body::create($input['Body']) : null;
+        $this->subject = isset($input['Subject']) ? Content::create($input['Subject']) : $this->throwException(new InvalidArgument('Missing required field "Subject".'));
+        $this->body = isset($input['Body']) ? Body::create($input['Body']) : $this->throwException(new InvalidArgument('Missing required field "Body".'));
     }
 
     /**
@@ -61,15 +61,19 @@ public function getSubject(): Content
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->subject) {
-            throw new InvalidArgument(sprintf('Missing parameter "Subject" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->subject;
         $payload['Subject'] = $v->requestBody();
-        if (null === $v = $this->body) {
-            throw new InvalidArgument(sprintf('Missing parameter "Body" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->body;
         $payload['Body'] = $v->requestBody();
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ses/src/ValueObject/MessageTag.php b/src/Service/Ses/src/ValueObject/MessageTag.php
index 0060ad2d0..b94c8d53e 100644
--- a/src/Service/Ses/src/ValueObject/MessageTag.php
+++ b/src/Service/Ses/src/ValueObject/MessageTag.php
@@ -34,8 +34,8 @@ final class MessageTag
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -65,15 +65,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ses/src/ValueObject/RawMessage.php b/src/Service/Ses/src/ValueObject/RawMessage.php
index 8c3879f40..746c6c5db 100644
--- a/src/Service/Ses/src/ValueObject/RawMessage.php
+++ b/src/Service/Ses/src/ValueObject/RawMessage.php
@@ -33,7 +33,7 @@ final class RawMessage
      */
     public function __construct(array $input)
     {
-        $this->data = $input['Data'] ?? null;
+        $this->data = $input['Data'] ?? $this->throwException(new InvalidArgument('Missing required field "Data".'));
     }
 
     /**
@@ -57,11 +57,17 @@ public function getData(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->data) {
-            throw new InvalidArgument(sprintf('Missing parameter "Data" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->data;
         $payload['Data'] = base64_encode($v);
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sns/src/ValueObject/BatchResultErrorEntry.php b/src/Service/Sns/src/ValueObject/BatchResultErrorEntry.php
index b20150e24..989a2b137 100644
--- a/src/Service/Sns/src/ValueObject/BatchResultErrorEntry.php
+++ b/src/Service/Sns/src/ValueObject/BatchResultErrorEntry.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Sns\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Gives a detailed description of failed messages in the batch.
  */
@@ -37,10 +39,10 @@ final class BatchResultErrorEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->code = $input['Code'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->code = $input['Code'] ?? $this->throwException(new InvalidArgument('Missing required field "Code".'));
         $this->message = $input['Message'] ?? null;
-        $this->senderFault = $input['SenderFault'] ?? null;
+        $this->senderFault = $input['SenderFault'] ?? $this->throwException(new InvalidArgument('Missing required field "SenderFault".'));
     }
 
     /**
@@ -75,4 +77,12 @@ public function getSenderFault(): bool
     {
         return $this->senderFault;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sns/src/ValueObject/MessageAttributeValue.php b/src/Service/Sns/src/ValueObject/MessageAttributeValue.php
index 5c5192a5e..d418d8686 100644
--- a/src/Service/Sns/src/ValueObject/MessageAttributeValue.php
+++ b/src/Service/Sns/src/ValueObject/MessageAttributeValue.php
@@ -48,7 +48,7 @@ final class MessageAttributeValue
      */
     public function __construct(array $input)
     {
-        $this->dataType = $input['DataType'] ?? null;
+        $this->dataType = $input['DataType'] ?? $this->throwException(new InvalidArgument('Missing required field "DataType".'));
         $this->stringValue = $input['StringValue'] ?? null;
         $this->binaryValue = $input['BinaryValue'] ?? null;
     }
@@ -86,9 +86,7 @@ public function getStringValue(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->dataType) {
-            throw new InvalidArgument(sprintf('Missing parameter "DataType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->dataType;
         $payload['DataType'] = $v;
         if (null !== $v = $this->stringValue) {
             $payload['StringValue'] = $v;
@@ -99,4 +97,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sns/src/ValueObject/PublishBatchRequestEntry.php b/src/Service/Sns/src/ValueObject/PublishBatchRequestEntry.php
index 83fd03ba5..8f692d54d 100644
--- a/src/Service/Sns/src/ValueObject/PublishBatchRequestEntry.php
+++ b/src/Service/Sns/src/ValueObject/PublishBatchRequestEntry.php
@@ -122,8 +122,8 @@ final class PublishBatchRequestEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->message = $input['Message'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->message = $input['Message'] ?? $this->throwException(new InvalidArgument('Missing required field "Message".'));
         $this->subject = $input['Subject'] ?? null;
         $this->messageStructure = $input['MessageStructure'] ?? null;
         $this->messageAttributes = isset($input['MessageAttributes']) ? array_map([MessageAttributeValue::class, 'create'], $input['MessageAttributes']) : null;
@@ -191,13 +191,9 @@ public function getSubject(): ?string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->id) {
-            throw new InvalidArgument(sprintf('Missing parameter "Id" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->id;
         $payload['Id'] = $v;
-        if (null === $v = $this->message) {
-            throw new InvalidArgument(sprintf('Missing parameter "Message" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->message;
         $payload['Message'] = $v;
         if (null !== $v = $this->subject) {
             $payload['Subject'] = $v;
@@ -224,4 +220,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sns/src/ValueObject/Tag.php b/src/Service/Sns/src/ValueObject/Tag.php
index 81ed35a8a..d4d6527d8 100644
--- a/src/Service/Sns/src/ValueObject/Tag.php
+++ b/src/Service/Sns/src/ValueObject/Tag.php
@@ -27,8 +27,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -58,15 +58,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/BatchResultErrorEntry.php b/src/Service/Sqs/src/ValueObject/BatchResultErrorEntry.php
index 0bb24a59f..1ffbc8c74 100644
--- a/src/Service/Sqs/src/ValueObject/BatchResultErrorEntry.php
+++ b/src/Service/Sqs/src/ValueObject/BatchResultErrorEntry.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Sqs\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Gives a detailed description of the result of an action on each entry in the request.
  */
@@ -37,9 +39,9 @@ final class BatchResultErrorEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->senderFault = $input['SenderFault'] ?? null;
-        $this->code = $input['Code'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->senderFault = $input['SenderFault'] ?? $this->throwException(new InvalidArgument('Missing required field "SenderFault".'));
+        $this->code = $input['Code'] ?? $this->throwException(new InvalidArgument('Missing required field "Code".'));
         $this->message = $input['Message'] ?? null;
     }
 
@@ -75,4 +77,12 @@ public function getSenderFault(): bool
     {
         return $this->senderFault;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchRequestEntry.php b/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchRequestEntry.php
index 52524cbf2..4804170a9 100644
--- a/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchRequestEntry.php
+++ b/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchRequestEntry.php
@@ -38,8 +38,8 @@ final class ChangeMessageVisibilityBatchRequestEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->receiptHandle = $input['ReceiptHandle'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->receiptHandle = $input['ReceiptHandle'] ?? $this->throwException(new InvalidArgument('Missing required field "ReceiptHandle".'));
         $this->visibilityTimeout = $input['VisibilityTimeout'] ?? null;
     }
 
@@ -76,13 +76,9 @@ public function getVisibilityTimeout(): ?int
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->id) {
-            throw new InvalidArgument(sprintf('Missing parameter "Id" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->id;
         $payload['Id'] = $v;
-        if (null === $v = $this->receiptHandle) {
-            throw new InvalidArgument(sprintf('Missing parameter "ReceiptHandle" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->receiptHandle;
         $payload['ReceiptHandle'] = $v;
         if (null !== $v = $this->visibilityTimeout) {
             $payload['VisibilityTimeout'] = $v;
@@ -90,4 +86,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchResultEntry.php b/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchResultEntry.php
index 0095972de..97f7680c0 100644
--- a/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchResultEntry.php
+++ b/src/Service/Sqs/src/ValueObject/ChangeMessageVisibilityBatchResultEntry.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Sqs\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Encloses the `Id` of an entry in `ChangeMessageVisibilityBatch.`.
  */
@@ -19,7 +21,7 @@ final class ChangeMessageVisibilityBatchResultEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
     }
 
     /**
@@ -36,4 +38,12 @@ public function getId(): string
     {
         return $this->id;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/DeleteMessageBatchRequestEntry.php b/src/Service/Sqs/src/ValueObject/DeleteMessageBatchRequestEntry.php
index 5bc3e7e3c..cb668b17a 100644
--- a/src/Service/Sqs/src/ValueObject/DeleteMessageBatchRequestEntry.php
+++ b/src/Service/Sqs/src/ValueObject/DeleteMessageBatchRequestEntry.php
@@ -32,8 +32,8 @@ final class DeleteMessageBatchRequestEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->receiptHandle = $input['ReceiptHandle'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->receiptHandle = $input['ReceiptHandle'] ?? $this->throwException(new InvalidArgument('Missing required field "ReceiptHandle".'));
     }
 
     /**
@@ -63,15 +63,19 @@ public function getReceiptHandle(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->id) {
-            throw new InvalidArgument(sprintf('Missing parameter "Id" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->id;
         $payload['Id'] = $v;
-        if (null === $v = $this->receiptHandle) {
-            throw new InvalidArgument(sprintf('Missing parameter "ReceiptHandle" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->receiptHandle;
         $payload['ReceiptHandle'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/DeleteMessageBatchResultEntry.php b/src/Service/Sqs/src/ValueObject/DeleteMessageBatchResultEntry.php
index 964d554d4..4bc4a8842 100644
--- a/src/Service/Sqs/src/ValueObject/DeleteMessageBatchResultEntry.php
+++ b/src/Service/Sqs/src/ValueObject/DeleteMessageBatchResultEntry.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Sqs\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Encloses the `Id` of an entry in `DeleteMessageBatch.`.
  */
@@ -19,7 +21,7 @@ final class DeleteMessageBatchResultEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
     }
 
     /**
@@ -36,4 +38,12 @@ public function getId(): string
     {
         return $this->id;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/MessageAttributeValue.php b/src/Service/Sqs/src/ValueObject/MessageAttributeValue.php
index 602f252f7..e10d6dd3b 100644
--- a/src/Service/Sqs/src/ValueObject/MessageAttributeValue.php
+++ b/src/Service/Sqs/src/ValueObject/MessageAttributeValue.php
@@ -61,7 +61,7 @@ public function __construct(array $input)
         $this->binaryValue = $input['BinaryValue'] ?? null;
         $this->stringListValues = $input['StringListValues'] ?? null;
         $this->binaryListValues = $input['BinaryListValues'] ?? null;
-        $this->dataType = $input['DataType'] ?? null;
+        $this->dataType = $input['DataType'] ?? $this->throwException(new InvalidArgument('Missing required field "DataType".'));
     }
 
     /**
@@ -135,11 +135,17 @@ public function requestBody(): array
                 $payload["BinaryListValue.$index"] = base64_encode($mapValue);
             }
         }
-        if (null === $v = $this->dataType) {
-            throw new InvalidArgument(sprintf('Missing parameter "DataType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->dataType;
         $payload['DataType'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/MessageSystemAttributeValue.php b/src/Service/Sqs/src/ValueObject/MessageSystemAttributeValue.php
index 4f88c16ee..fa51bae10 100644
--- a/src/Service/Sqs/src/ValueObject/MessageSystemAttributeValue.php
+++ b/src/Service/Sqs/src/ValueObject/MessageSystemAttributeValue.php
@@ -60,7 +60,7 @@ public function __construct(array $input)
         $this->binaryValue = $input['BinaryValue'] ?? null;
         $this->stringListValues = $input['StringListValues'] ?? null;
         $this->binaryListValues = $input['BinaryListValues'] ?? null;
-        $this->dataType = $input['DataType'] ?? null;
+        $this->dataType = $input['DataType'] ?? $this->throwException(new InvalidArgument('Missing required field "DataType".'));
     }
 
     /**
@@ -134,11 +134,17 @@ public function requestBody(): array
                 $payload["BinaryListValue.$index"] = base64_encode($mapValue);
             }
         }
-        if (null === $v = $this->dataType) {
-            throw new InvalidArgument(sprintf('Missing parameter "DataType" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->dataType;
         $payload['DataType'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/SendMessageBatchRequestEntry.php b/src/Service/Sqs/src/ValueObject/SendMessageBatchRequestEntry.php
index fac632964..18c05f59f 100644
--- a/src/Service/Sqs/src/ValueObject/SendMessageBatchRequestEntry.php
+++ b/src/Service/Sqs/src/ValueObject/SendMessageBatchRequestEntry.php
@@ -135,8 +135,8 @@ final class SendMessageBatchRequestEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->messageBody = $input['MessageBody'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->messageBody = $input['MessageBody'] ?? $this->throwException(new InvalidArgument('Missing required field "MessageBody".'));
         $this->delaySeconds = $input['DelaySeconds'] ?? null;
         $this->messageAttributes = isset($input['MessageAttributes']) ? array_map([MessageAttributeValue::class, 'create'], $input['MessageAttributes']) : null;
         $this->messageSystemAttributes = isset($input['MessageSystemAttributes']) ? array_map([MessageSystemAttributeValue::class, 'create'], $input['MessageSystemAttributes']) : null;
@@ -207,13 +207,9 @@ public function getMessageSystemAttributes(): array
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->id) {
-            throw new InvalidArgument(sprintf('Missing parameter "Id" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->id;
         $payload['Id'] = $v;
-        if (null === $v = $this->messageBody) {
-            throw new InvalidArgument(sprintf('Missing parameter "MessageBody" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->messageBody;
         $payload['MessageBody'] = $v;
         if (null !== $v = $this->delaySeconds) {
             $payload['DelaySeconds'] = $v;
@@ -250,4 +246,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Sqs/src/ValueObject/SendMessageBatchResultEntry.php b/src/Service/Sqs/src/ValueObject/SendMessageBatchResultEntry.php
index 6285ea08f..15c65d816 100644
--- a/src/Service/Sqs/src/ValueObject/SendMessageBatchResultEntry.php
+++ b/src/Service/Sqs/src/ValueObject/SendMessageBatchResultEntry.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\Sqs\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Encloses a `MessageId` for a successfully-enqueued message in a `SendMessageBatch.`.
  */
@@ -66,9 +68,9 @@ final class SendMessageBatchResultEntry
      */
     public function __construct(array $input)
     {
-        $this->id = $input['Id'] ?? null;
-        $this->messageId = $input['MessageId'] ?? null;
-        $this->md5OfMessageBody = $input['MD5OfMessageBody'] ?? null;
+        $this->id = $input['Id'] ?? $this->throwException(new InvalidArgument('Missing required field "Id".'));
+        $this->messageId = $input['MessageId'] ?? $this->throwException(new InvalidArgument('Missing required field "MessageId".'));
+        $this->md5OfMessageBody = $input['MD5OfMessageBody'] ?? $this->throwException(new InvalidArgument('Missing required field "MD5OfMessageBody".'));
         $this->md5OfMessageAttributes = $input['MD5OfMessageAttributes'] ?? null;
         $this->md5OfMessageSystemAttributes = $input['MD5OfMessageSystemAttributes'] ?? null;
         $this->sequenceNumber = $input['SequenceNumber'] ?? null;
@@ -118,4 +120,12 @@ public function getSequenceNumber(): ?string
     {
         return $this->sequenceNumber;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ssm/src/ValueObject/ParameterStringFilter.php b/src/Service/Ssm/src/ValueObject/ParameterStringFilter.php
index eb5cbcb86..a694c6b5a 100644
--- a/src/Service/Ssm/src/ValueObject/ParameterStringFilter.php
+++ b/src/Service/Ssm/src/ValueObject/ParameterStringFilter.php
@@ -51,7 +51,7 @@ final class ParameterStringFilter
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
         $this->option = $input['Option'] ?? null;
         $this->values = $input['Values'] ?? null;
     }
@@ -92,9 +92,7 @@ public function getValues(): array
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
         if (null !== $v = $this->option) {
             $payload['Option'] = $v;
@@ -110,4 +108,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/Ssm/src/ValueObject/Tag.php b/src/Service/Ssm/src/ValueObject/Tag.php
index 2d9b971f5..5ff2f1424 100644
--- a/src/Service/Ssm/src/ValueObject/Tag.php
+++ b/src/Service/Ssm/src/ValueObject/Tag.php
@@ -30,8 +30,8 @@ final class Tag
      */
     public function __construct(array $input)
     {
-        $this->key = $input['Key'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->key = $input['Key'] ?? $this->throwException(new InvalidArgument('Missing required field "Key".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -61,15 +61,19 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->key) {
-            throw new InvalidArgument(sprintf('Missing parameter "Key" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->key;
         $payload['Key'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamQuery/src/ValueObject/ColumnInfo.php b/src/Service/TimestreamQuery/src/ValueObject/ColumnInfo.php
index 1f72b4cd1..0eaf1712c 100644
--- a/src/Service/TimestreamQuery/src/ValueObject/ColumnInfo.php
+++ b/src/Service/TimestreamQuery/src/ValueObject/ColumnInfo.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\TimestreamQuery\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Contains the metadata for query results such as the column names, data types, and other attributes.
  */
@@ -28,7 +30,7 @@ final class ColumnInfo
     public function __construct(array $input)
     {
         $this->name = $input['Name'] ?? null;
-        $this->type = isset($input['Type']) ? Type::create($input['Type']) : null;
+        $this->type = isset($input['Type']) ? Type::create($input['Type']) : $this->throwException(new InvalidArgument('Missing required field "Type".'));
     }
 
     /**
@@ -51,4 +53,12 @@ public function getType(): Type
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamQuery/src/ValueObject/Endpoint.php b/src/Service/TimestreamQuery/src/ValueObject/Endpoint.php
index 23bddcf95..d7b361df7 100644
--- a/src/Service/TimestreamQuery/src/ValueObject/Endpoint.php
+++ b/src/Service/TimestreamQuery/src/ValueObject/Endpoint.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\TimestreamQuery\ValueObject;
 
 use AsyncAws\Core\EndpointDiscovery\EndpointInterface;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * Represents an available endpoint against which to make API calls against, as well as the TTL for that endpoint.
@@ -27,8 +28,8 @@ final class Endpoint implements EndpointInterface
      */
     public function __construct(array $input)
     {
-        $this->address = $input['Address'] ?? null;
-        $this->cachePeriodInMinutes = $input['CachePeriodInMinutes'] ?? null;
+        $this->address = $input['Address'] ?? $this->throwException(new InvalidArgument('Missing required field "Address".'));
+        $this->cachePeriodInMinutes = $input['CachePeriodInMinutes'] ?? $this->throwException(new InvalidArgument('Missing required field "CachePeriodInMinutes".'));
     }
 
     /**
@@ -51,4 +52,12 @@ public function getCachePeriodInMinutes(): int
     {
         return $this->cachePeriodInMinutes;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamQuery/src/ValueObject/ParameterMapping.php b/src/Service/TimestreamQuery/src/ValueObject/ParameterMapping.php
index 43e049abb..36104916b 100644
--- a/src/Service/TimestreamQuery/src/ValueObject/ParameterMapping.php
+++ b/src/Service/TimestreamQuery/src/ValueObject/ParameterMapping.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\TimestreamQuery\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Mapping for named parameters.
  */
@@ -22,8 +24,8 @@ final class ParameterMapping
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->type = isset($input['Type']) ? Type::create($input['Type']) : null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->type = isset($input['Type']) ? Type::create($input['Type']) : $this->throwException(new InvalidArgument('Missing required field "Type".'));
     }
 
     /**
@@ -46,4 +48,12 @@ public function getType(): Type
     {
         return $this->type;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamQuery/src/ValueObject/Row.php b/src/Service/TimestreamQuery/src/ValueObject/Row.php
index 4927132a5..7bf522c61 100644
--- a/src/Service/TimestreamQuery/src/ValueObject/Row.php
+++ b/src/Service/TimestreamQuery/src/ValueObject/Row.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\TimestreamQuery\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * Represents a single row in the query results.
  */
@@ -19,7 +21,7 @@ final class Row
      */
     public function __construct(array $input)
     {
-        $this->data = isset($input['Data']) ? array_map([Datum::class, 'create'], $input['Data']) : null;
+        $this->data = isset($input['Data']) ? array_map([Datum::class, 'create'], $input['Data']) : $this->throwException(new InvalidArgument('Missing required field "Data".'));
     }
 
     /**
@@ -37,6 +39,14 @@ public static function create($input): self
      */
     public function getData(): array
     {
-        return $this->data ?? [];
+        return $this->data;
+    }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
     }
 }
diff --git a/src/Service/TimestreamQuery/src/ValueObject/TimeSeriesDataPoint.php b/src/Service/TimestreamQuery/src/ValueObject/TimeSeriesDataPoint.php
index b69730754..291120088 100644
--- a/src/Service/TimestreamQuery/src/ValueObject/TimeSeriesDataPoint.php
+++ b/src/Service/TimestreamQuery/src/ValueObject/TimeSeriesDataPoint.php
@@ -2,6 +2,8 @@
 
 namespace AsyncAws\TimestreamQuery\ValueObject;
 
+use AsyncAws\Core\Exception\InvalidArgument;
+
 /**
  * The timeseries data type represents the values of a measure over time. A time series is an array of rows of
  * timestamps and measure values, with rows sorted in ascending order of time. A TimeSeriesDataPoint is a single data
@@ -27,8 +29,8 @@ final class TimeSeriesDataPoint
      */
     public function __construct(array $input)
     {
-        $this->time = $input['Time'] ?? null;
-        $this->value = isset($input['Value']) ? Datum::create($input['Value']) : null;
+        $this->time = $input['Time'] ?? $this->throwException(new InvalidArgument('Missing required field "Time".'));
+        $this->value = isset($input['Value']) ? Datum::create($input['Value']) : $this->throwException(new InvalidArgument('Missing required field "Value".'));
     }
 
     /**
@@ -51,4 +53,12 @@ public function getValue(): Datum
     {
         return $this->value;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamWrite/src/ValueObject/Dimension.php b/src/Service/TimestreamWrite/src/ValueObject/Dimension.php
index 47f6201d6..69cd0515a 100644
--- a/src/Service/TimestreamWrite/src/ValueObject/Dimension.php
+++ b/src/Service/TimestreamWrite/src/ValueObject/Dimension.php
@@ -40,8 +40,8 @@ final class Dimension
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->value = $input['Value'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
         $this->dimensionValueType = $input['DimensionValueType'] ?? null;
     }
 
@@ -81,13 +81,9 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
         if (null !== $v = $this->dimensionValueType) {
             if (!DimensionValueType::exists($v)) {
@@ -98,4 +94,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamWrite/src/ValueObject/Endpoint.php b/src/Service/TimestreamWrite/src/ValueObject/Endpoint.php
index a99689e1c..1ffecfc34 100644
--- a/src/Service/TimestreamWrite/src/ValueObject/Endpoint.php
+++ b/src/Service/TimestreamWrite/src/ValueObject/Endpoint.php
@@ -3,6 +3,7 @@
 namespace AsyncAws\TimestreamWrite\ValueObject;
 
 use AsyncAws\Core\EndpointDiscovery\EndpointInterface;
+use AsyncAws\Core\Exception\InvalidArgument;
 
 /**
  * Represents an available endpoint against which to make API calls against, as well as the TTL for that endpoint.
@@ -27,8 +28,8 @@ final class Endpoint implements EndpointInterface
      */
     public function __construct(array $input)
     {
-        $this->address = $input['Address'] ?? null;
-        $this->cachePeriodInMinutes = $input['CachePeriodInMinutes'] ?? null;
+        $this->address = $input['Address'] ?? $this->throwException(new InvalidArgument('Missing required field "Address".'));
+        $this->cachePeriodInMinutes = $input['CachePeriodInMinutes'] ?? $this->throwException(new InvalidArgument('Missing required field "CachePeriodInMinutes".'));
     }
 
     /**
@@ -51,4 +52,12 @@ public function getCachePeriodInMinutes(): int
     {
         return $this->cachePeriodInMinutes;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }
diff --git a/src/Service/TimestreamWrite/src/ValueObject/MeasureValue.php b/src/Service/TimestreamWrite/src/ValueObject/MeasureValue.php
index 919001fb5..6fc8c0041 100644
--- a/src/Service/TimestreamWrite/src/ValueObject/MeasureValue.php
+++ b/src/Service/TimestreamWrite/src/ValueObject/MeasureValue.php
@@ -44,9 +44,9 @@ final class MeasureValue
      */
     public function __construct(array $input)
     {
-        $this->name = $input['Name'] ?? null;
-        $this->value = $input['Value'] ?? null;
-        $this->type = $input['Type'] ?? null;
+        $this->name = $input['Name'] ?? $this->throwException(new InvalidArgument('Missing required field "Name".'));
+        $this->value = $input['Value'] ?? $this->throwException(new InvalidArgument('Missing required field "Value".'));
+        $this->type = $input['Type'] ?? $this->throwException(new InvalidArgument('Missing required field "Type".'));
     }
 
     /**
@@ -85,17 +85,11 @@ public function getValue(): string
     public function requestBody(): array
     {
         $payload = [];
-        if (null === $v = $this->name) {
-            throw new InvalidArgument(sprintf('Missing parameter "Name" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->name;
         $payload['Name'] = $v;
-        if (null === $v = $this->value) {
-            throw new InvalidArgument(sprintf('Missing parameter "Value" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->value;
         $payload['Value'] = $v;
-        if (null === $v = $this->type) {
-            throw new InvalidArgument(sprintf('Missing parameter "Type" for "%s". The value cannot be null.', __CLASS__));
-        }
+        $v = $this->type;
         if (!MeasureValueType::exists($v)) {
             throw new InvalidArgument(sprintf('Invalid parameter "Type" for "%s". The value "%s" is not a valid "MeasureValueType".', __CLASS__, $v));
         }
@@ -103,4 +97,12 @@ public function requestBody(): array
 
         return $payload;
     }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
 }