firePropertyChange(CELL_RENDERER_PROPERTY_CHANGED, old, renderer);
firePropertyChange("cellRenderer", old, renderer);
  public void setCellRenderer(ListCellRenderer renderer)  {    if (cellRenderer == renderer)      return;        ListCellRenderer old = cellRenderer;    cellRenderer = renderer;    firePropertyChange(CELL_RENDERER_PROPERTY_CHANGED, old, renderer);    revalidate();    repaint();  }