Invoked by pika when RabbitMQ has finished the Exchange.Declare RPC
        command.

        :param pika.Frame.Method unused_frame: Exchange.DeclareOk response frame

def on_exchange_declareok(self, unused_frame):
        """
        Invoked by pika when RabbitMQ has finished the Exchange.Declare RPC
        command.

        :param pika.Frame.Method unused_frame: Exchange.DeclareOk response frame
        """
        self._logger.debug('Exchange declared')
        self.setup_queue(self._queue)