Component c = super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
    public Component getTreeCellRendererComponent(JTree tree, Object value,                                                  boolean sel, boolean expanded,                                                  boolean leaf,                                                  int row, boolean hasFocus) {      Icon icon = ( (Node) value).getConvenientIcon();      if (icon != null) {        setIcon(icon);      }      return this;    }