@Override
 public void removeAriaLiveProperty(Element element) {
   Property.LIVE.remove(element);
 }
 @Override
 public void setAriaLiveProperty(Element element, LiveToken value) {
   Property.LIVE.set(element, value);
 }
 @Override
 public String getAriaLiveProperty(Element element) {
   return Property.LIVE.get(element);
 }