code: public List<ListenerType<WebFragmentDescriptor>> getAllListener()
     {
        List<ListenerType<WebFragmentDescriptor>> list = new ArrayList<ListenerType<WebFragmentDescriptor>>();
        List<Node> nodeList = model.get("listener");
        for(Node node: nodeList)
        {
           ListenerType<WebFragmentDescriptor>  type = new ListenerTypeImpl<WebFragmentDescriptor>(this, "listener", model, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>listener</code> elements
  @return list of <code>listener</code>