def _CheckSocket(self):
    if self._rstream is None or self._wstream is None:
      raise errors.ProtocolError("Connection is closed")
Retrieve an object from S3 using the name of the Key object as the
dataset/ETHPy150Open ganeti/ganeti/lib/rpc/transport.py/FdTransport._CheckSocket--crossover with--dataset/ETHPy150Open yyuu/botornado/botornado/s3/key.py/AsyncKey.get_contents_to_filename