// Called when the owning graph starts playing
 public override void OnGraphStart(Playable playable)
 {
     if (Application.isPlaying)
     {
         if (control != null)
         {
             for (int i = 0; i < graphStartEvents.Count; i++)
             {
                 control.Dispatch(ETimelineCycleType.GraphStart, graphStartEvents[i].key, graphStartEvents[i].value);
             }
         }
     }
 }