firePropertyChange(DISABLED_ICON_CHANGED_PROPERTY, oldIcon, newIcon);
firePropertyChange("disabledIcon", oldIcon, newIcon);
  public void setDisabledIcon(Icon newIcon)  {    if (disabledIcon != newIcon)      {	Icon oldIcon = disabledIcon;	disabledIcon = newIcon;	firePropertyChange(DISABLED_ICON_CHANGED_PROPERTY, oldIcon, newIcon);      }  }