require() autocomplete?

[karl-police]

I am wondering how the autocomplete works when using require(), e.g. since it can return any, and I am wondering what controls that.

But there's a lot of require based files and I don't know which one is the one that is actually for the type solver and autocomplete.

I also wonder if there's any UnitTest inside of the tests folder, that emulates the location of a Module. Because I don't know how I can emulate a string path or a Roblox DataModel Location inside Luau...