A collection of methods and properties for accessing XR input devices by their XR Node representation.
        XR devices can be accessed in different ways, with the XR Node representing a physical input source such as a head position, hand, or camera.
See XR Input for an overview of accessing XR devices.
      
| 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. |