The state of a tracked mesh since the last query.
                This enum is used by MeshInfo to indicate which meshes have been added, updated, or removed.
                See Also: XRMeshSubsystem.TryGetMeshInfos
| Added | The mesh has been added since the last call to XRMeshSubsystem.TryGetMeshInfos. | 
| Updated | The mesh has been updated since the last call to XRMeshSubsystem.TryGetMeshInfos. | 
| Removed | The mesh has been removed since the last call to XRMeshSubsystem.TryGetMeshInfos. | 
| Unchanged | The mesh has not changed since the last call to XRMeshSubsystem.TryGetMeshInfos. |