@Override
  public void eraseFeedback() {
    if (myFirstInsertFeedback != null) {
      FeedbackLayer layer = myContext.getArea().getFeedbackLayer();
      layer.remove(myFirstInsertFeedback);
      layer.remove(myInsertFeedback);
      layer.repaint();
      myFirstInsertFeedback = null;
      myInsertFeedback = null;
    }
  }
@Override
  public void eraseFeedback()