code: public void paintTabbedPaneTabBackground(SynthContext context, Graphics g, int x, int y, int w, int h, int tabIndex) {
          paintBackground(context, g, x, y, w, h, null);
      }
docs: Paints the background of a tab of a tabbed pane.
  
  @param context  SynthContext identifying the <code>JComponent</code> and
  <code>Region</code> to paint to
  @param g        <code>Graphics</code> to paint to
  @param x        X coordinate of the area to paint to
  @param y        Y coordinate of the area to paint to
  @param w        Width of the area to paint to
  @param h        Height of the area to paint to
  @param tabIndex Index of tab being painted.