else { if (nullIcon == null) nullIcon = new Icon() { public int getIconHeight() { return 0; }  public int getIconWidth() { return 0; }  public void paintIcon(Component c, Graphics g, int x, int y) {  } }; return nullIcon; } }
  Icon getCurrentControlIcon(TreePath path)  {    if (tree.isExpanded(path))      return expandedIcon;    return collapsedIcon;  }