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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def on_delivery(self, channel, method, properties, body):
 """Invoked by pika when RabbitMQ delivers a message from a queue. :param channel: The channel the message was delivered on :type channel: pika.channel.Channel :param method: The AMQP method frame :type method: pika.frame.Frame :param properties: The AMQP message properties :type properties: pika.spec.Basic.Properties :param bytes body: The message body """

        self.callbacks.on_delivery(
            self.name, channel, method, properties, body)