Hello, I would really love to see precompile directives corresponding to Unity's built-in packages. This will allow me to easily share the same libraries between the projects, even if they have different requirements. Let's say I have some scripts that use the Rigidbody class, I can just wrap them in #if UNITY_PHYSICS_PACKAGE ... #endif and they won't raise errors if I disable the Physics module. I am aware that I could write my own system of precompile directives, but having this provided by the Package Manager would make things more neat. Let me know what you think.