What is the current equivalent of the WorldManager class?

I'm currently trying to implement a mixed reality project that makes use of a World Manager class (outdated documentation here: https://docs.unity3d.com/560/Documentation/ScriptReference/VR.WSA.WorldManager.html#:~:text=WorldManager%20class%20in%20UnityEngine.VR.WSA%20Other%20Versions%20Description%20This,the%20state%20of%20the%20real%20world%20tracking%20system.)

However this class no longer exists in the unity documentation as it seems to have been gotten rid of sometime in 2017-2018. Does anyone know what the current equivalent of this class would be? In particular I need to use the GetNativeISpatialCoordinateSystemPtr function that this class provides.