def __init__(self, message_type, fields, description=""):
        self.message_type = message_type
        self.description = description
        self._serializer = _MessageSerializer(
            fields + [Field.forValue(MESSAGE_TYPE_FIELD, message_type,
                                     "The message type.")])
Shut down any child processes started.
dataset/ETHPy150Open ClusterHQ/eliot/eliot/_validation.py/MessageType.__init__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/dev_appserver_multiprocess.py/Shutdown