How to get the inspect GUI interface?

[yt2100]

In https://github.com/juliangarnier/anime/wiki/What's-new-in-Anime.js-V4#-gui, the inspect GUI interface is mentioned.
But I looked through all the documents and didn't find the usage of the inspect GUI interface?
Is this part paid content? How can I get it?
gsap also has GSDevTools, which makes animation very convenient, so I want to know how to get the inspect GUI interface?

[juliangarnier]

Unfortunately the GUI had too many little bugs and don't have the level of polish required to be released publicly. I'm keeping beta features under early access for my monthly sponsors only to limit bug reports and time spent on support. But it will be public at some point.
I also deleted the wiki page you linked too, it was outdated.
Please refer to the migration guide and release notes instead.
Migrating from v3 to v4: https://github.com/juliangarnier/anime/wiki/Migrating-from-v3-to-v4
v4 release notes: https://github.com/juliangarnier/anime/releases/tag/v4.0.0