code: public List<LifecycleCallbackType<WebFragmentDescriptor>> getAllPreDestroy()
     {
        List<LifecycleCallbackType<WebFragmentDescriptor>> list = new ArrayList<LifecycleCallbackType<WebFragmentDescriptor>>();
        List<Node> nodeList = model.get("pre-destroy");
        for(Node node: nodeList)
        {
           LifecycleCallbackType<WebFragmentDescriptor>  type = new LifecycleCallbackTypeImpl<WebFragmentDescriptor>(this, "pre-destroy", model, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>pre-destroy</code> elements
  @return list of <code>pre-destroy</code>