def _to_pbs(self):



    pbs = []
    for f in self._filters:
      pbs.extend(f._to_pbs())
    return pbs
Helper for pickling, which allows us to save and restore UNKNOWN,
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/datastore/datastore_query.py/CompositeFilter._to_pbs--crossover with--dataset/ETHPy150Open QuantSoftware/QuantSoftwareToolkit/Legacy/epydoc-3.0.1/epydoc/cli.py/pickle_persistent_load