def get_detail_stream(self, stream, content_type_id, object_id):
        """
        Helper for returning a stream that takes a content type/object id to lookup an instance
        """
        content_type = get_object_or_404(ContentType, id=content_type_id)
        obj = content_type.get_object_for_this_type(pk=object_id)
        return self.get_stream(stream(obj))

        Helper for returning a stream that takes a content type/object id to lookup an instance
        
actstream/drf/views.py