if (b.getDisabledIcon() == null) b.setDisabledIcon(icon); if (b.getDisabledSelectedIcon() == null) b.setDisabledSelectedIcon(icon);
  protected void installDefaults(AbstractButton b)  {    super.installDefaults(b);    if (b.getIcon() == null)      b.setIcon(icon);    if (b.getSelectedIcon() == null)      b.setSelectedIcon(icon);  }