def _check_unnotified(self):
    if self._notified:
      raise RuntimeError("cannot use already notified condition")
Marshal the metadata attribute of a parsed request.
dataset/ETHPy150Open ganeti/ganeti/lib/locking.py/SingleNotifyPipeCondition._check_unnotified--crossover with--dataset/ETHPy150Open openstack/rack/rack/api/wsgi.py/MetadataXMLDeserializer.extract_metadata