static public void RemoveMouseSwipeCallback(MouseSwipe.MouseSwipeCallback callback)
 {
     if (_mouseSwipe != null)
     {
         _mouseSwipe.onSwipe -= callback;
     }
 }
 static public void AddMouseSwipeCallback(MouseSwipe.MouseSwipeCallback callback)
 {
     if (InputUtils.instance != null)
     {
         if (_mouseSwipe != null)
         {
             _mouseSwipe.onSwipe += callback;
         }
     }
 }