code: @Override
      public void perform(final Wave wave) {
  
          final JRebirthEvent event = wave.get(EditorWaves.EVENT);
          final BallModel targetBallModel = getModel(BallModel.class, event);
          targetBallModel.access();
  
          // getModel(EditorModel.class).unregisterBall(targetBallModel);
      }
docs: {@inheritDoc}