code: public void paintSplitPaneDividerForeground(SynthContext context, Graphics g, int x, int y, int w, int h, int orientation) {
          paintForeground(context, g, x, y, w, h, null);
      }
docs: Paints the foreground of the divider of a split 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 orientation One of <code>JSplitPane.HORIZONTAL_SPLIT</code> or
  <code>JSplitPane.VERTICAL_SPLIT</code>