private void OnCloneComplete()
 {
     _overlayImageGraphic = (GrayscaleImageGraphic)CollectionUtils.SelectFirst(base.Graphics, g => g is GrayscaleImageGraphic);
     if (_overlayImageGraphic != null)
     {
         _voiLutManagerProxy.SetRealVoiLutManager(_overlayImageGraphic.VoiLutManager);
         _colorMapManagerProxy.SetRealColorMapManager(_overlayImageGraphic.ColorMapManager);
     }
 }