@Override
  protected void doPaintTooltipImage(Component rComponent,
                                     Rectangle cellBounds,
                                     Graphics2D g,
                                     Integer key) {
    DefaultTreeUI.setBackground(myComponent, rComponent, key);
    super.doPaintTooltipImage(rComponent, cellBounds, g, key);
  }
@Override
  protected void doPaintTooltipImage(Component rComponent,
                                     Rectangle cellBounds,
                                     Graphics2D g,
                                     Integer key)