I notice that the properties in [https://github.com/rails-api/active_model_serializers/blob/master/lib/active_model_serializers/adapter/json_api/error.rb#L24](https://github.com/rails-api/active_model_serializers/blob/master/lib/active_model_serializers/adapter/json_api/error.rb#L24) showcase code, meta as properties in the errors according to the json standard. But the code doesn't show a place where it renders it. Any inputs on this?