def is_not_modified(self, dispatcher):
        return (Dispatcher.enable_etags and
                (self.etag.strip('"') in dispatcher.request.if_none_match))
Checks if the cache response is unmodified with respect to the
dataset/ETHPy150Open jahlborn/appengine-rest-server/src/main/python/rest/__init__.py/CachedResponse.is_not_modified