'Change :class:`QoS` settings for this Channel.
Set the number of un-acknowledged messages this Channel can fetch and
hold. The prefetch_value is also used as the capacity for any new
:class:`~qpid.messaging.endpoints.Receiver` objects.
Currently, this value is hard coded to 1.
:param prefetch_count: Not used. This method is hard-coded to 1.
:type prefetch_count: int'

def basic_qos(self, prefetch_count, *args):

    self.qos.prefetch_count = 1
