/// <summary>
 /// Observable DestinationMarkerExit event
 /// </summary>
 /// <param name="events"></param>
 /// <returns></returns>
 public static IObservable <DestinationMarkerEventArgs> DestinationMarkerExitAsObservable(this VRTK_DestinationPoint events)
 {
     return(Observable.FromEvent <DestinationMarkerEventHandler, DestinationMarkerEventArgs>(
                h => (s, e) => h(e),
                h => events.DestinationMarkerExit += h,
                h => events.DestinationMarkerExit -= h));
 }