Base class for Positional trackers managed by OpenXR's spatial entity extensions. These are trackers created and managed by OpenXR's spatial entity extensions that give access to specific data related to OpenXR's spatial entities. They will always be of type [code]TRACKER_ANCHOR[/code]. The spatial entity associated with this tracker. The spatial tracking state for this tracker. This anchor has stopped tracking. Tracking is currently paused. This anchor is currently being tracked.