public override void Undo()
 {
     _terrain.DeleteDecorationModelResource(_model);
     if (TerrainEditor.CurrentDecorationModel == _model)
     {
         TerrainEditor.CurrentDecorationModel = null;
     }
     TerrainEditor.TriggerOnDecorationModelListChanged();
 }
 public override void Do()
 {
     _terrain.AddDecorationModelResource(_model);
     TerrainEditor.TriggerOnDecorationModelListChanged();
 }