@Override
  public void accept(Integer countValue) {
    String oldCountValue = myCountValue;
    myCountValue = countValue == null || countValue <= 0 ? null : countValue.toString();
    if (myTree != null && !StringUtil.equals(oldCountValue, myCountValue)) {
      myTree.repaint();
    }
  }
@Override
  public void accept(Integer countValue)