def state(self):
        """
        State of this instance. One of ``OFFLINE``, ``INITIALIZING``,
        ``INITIALIZED``, ``STARTING``, ``RUNNING``, ``STOPPING`` or
        ``FAILED``.
        """
        if self._proto.HasField('state'):
            return yamcsManagement_pb2.YamcsInstance.InstanceState.Name(self._proto.state)
        return None