def METHOD_NAME(self, subject_id, entity_id):
    """Scrap the assertions received from a IdP or an AA about a special
    subject.
    :param subject_id: The subjects identifier
    :param entity_id: The identifier of the entity_id of the assertion
    :return:
    """
    if not self._cache.set(_key(subject_id, entity_id), {}, 0):
        raise CacheError("reset failed")