Class Exposure Tree

The Class Exposure Tree will tell you what classes and methods that are available in Udon.

You can open the window by going to VRChat SDK > Udon Sharp > Class Exposure Tree

Red = Not exposed to Udon
Green = Exposed to Udon

Udon Type Exposure Tree

The Show base members toggle will show methods inherited from base classes that are exposed, for instance on things inheriting from UnityEngine.Component, this will show the GetComponent<T>() functions since they're defined on the base class.

The Hide whitelisted accessors option is mostly there for VRChat if they decide to move away from using the secure heap. This will only show any functions that may return any type of UnityEngine.Object through a method return, method parameter, property, or field. This operates recursively so it will catch things that return structs that may contain a UnityEngine.Object as well.