code: void paintBackground(SeaGlassContext context, Graphics g, JComponent c) {
          if (((AbstractButton) c).isContentAreaFilled()) {
              context.getPainter().paintButtonBackground(context, g, 0, 0, c.getWidth(), c.getHeight());
          }
      }
docs: Paint the button background.
  
  @param context the Synth context.
  @param g       the Graphics context.
  @param c       the button component.