code: public List<FunctionType<WebJsptaglibraryDescriptor>> getAllFunction()
     {
        List<FunctionType<WebJsptaglibraryDescriptor>> list = new ArrayList<FunctionType<WebJsptaglibraryDescriptor>>();
        List<Node> nodeList = model.get("function");
        for(Node node: nodeList)
        {
           FunctionType<WebJsptaglibraryDescriptor>  type = new FunctionTypeImpl<WebJsptaglibraryDescriptor>(this, "function", model, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>function</code> elements
  @return list of <code>function</code>