def on_cancelok(self, unused_frame):
_logger.debug('<STR_LIT>')<EOL>self.close_channel()<EOL>
This method is invoked by pika when RabbitMQ acknowledges the
        cancellation of a consumer. At this point we will close the channel.
        This will invoke the on_channel_closed method once the channel has been
        closed, which will in-turn close the connection.

        :param pika.frame.Method unused_frame: The Basic.CancelOk frame