A collection of methods and properties for interacting with the XR tracking system.
| GetNodeStates | Describes all currently connected XRNodes and provides available tracking states for each. | 
| nodeAdded | Called when a tracked node is added to the underlying XR system. | 
| nodeRemoved | Called when a tracked node is removed from the underlying XR system. | 
| trackingAcquired | Called when a tracked node begins reporting tracking information. | 
| trackingLost | Called when a tracked node stops reporting tracking information. |