@SuppressWarnings("UnusedDeclaration")
 public IntegerMultiValueOption(Element element) throws XMLSerializationException {
   super(element);
   baseOption =
       XMLSerializer.classFromXML(element.getChild(BASE_OPTION_KEY), Options.IntegerOption.class);
 }
 @Override
 public Element toXML() {
   Element root = super.toXML();
   root.addContent(XMLSerializer.classToXML(BASE_OPTION_KEY, baseOption));
   return root;
 }