code: public List<CustomWindowStateType<PortletAppType<T>>> getAllCustomWindowState()
     {
        List<CustomWindowStateType<PortletAppType<T>>> list = new ArrayList<CustomWindowStateType<PortletAppType<T>>>();
        List<Node> nodeList = childNode.get("custom-window-state");
        for(Node node: nodeList)
        {
           CustomWindowStateType<PortletAppType<T>>  type = new CustomWindowStateTypeImpl<PortletAppType<T>>(this, "custom-window-state", childNode, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>custom-window-state</code> elements
  @return list of <code>custom-window-state</code>