def all_stored_fields(self):
        raise NotImplementedError
Gets called when the tunnel request is acknowledged by the other side
dataset/ETHPy150Open dokipen/whoosh/src/whoosh/reading.py/IndexReader.all_stored_fields--crossover with--dataset/ETHPy150Open EricssonResearch/calvin-base/calvin/runtime/north/calvin_proto.py/CalvinTunnel._setup_ack