public override void DoUndo()
 {
     if (!RedoGenerated)
     {
         HistoryPropsChange.GenerateRedo(Undo.Current.Prefabs.PropsChange).Register();
     }
     RedoGenerated = true;
     DoRedo();
 }
 public void RegisterPropsChange()
 {
     HistoryPropsChange.GenerateUndo(Prefabs.PropsChange).Register();
 }