code: public static void uninstall() {
  		final PopupFactory factory = PopupFactory.getSharedInstance();
  		if (!(factory instanceof ShadowPopupFactory)) {
  			return;
  		}
  
  		final PopupFactory stored = ((ShadowPopupFactory) factory).storedFactory;
  		PopupFactory.setSharedInstance(stored);
  	}
docs: Uninstalls the ShadowPopupFactory and restores the original
  popup factory as the new shared popup factory.
  
  @see #install()