protected void paintMarker(Graphics2D g, int x, int y, int width, int height, Crumb crumb, int thickness) {
    if (thickness > 0) {
      Color foreground = getMarkerForeground(crumb);
      if (foreground != null) {
        g.setColor(foreground);
        g.fillRect(x, y + height - thickness, width, thickness);
      }
    }
  }
protected void paintMarker(Graphics2D g, int x, int y, int width, int height, Crumb crumb, int thickness)