| value | Unity calls this delegate when the TrackingOriginFlags changes. |
An event that takes the delegate instance that the XRInputSubsystem calls when it changes the origin it reports devices at.
This can be due to a change in the TrackingOriginFlags or from the XRInputSubsystem moving the location of the origin without changing the type. See XRInputSubsystem.GetTrackingOrigin in order to see the new TrackingOriginFlags.