code: protected void subscriptionRequestSent(IoSession session,
  			SubscriptionMessage subscriptionMessage) {
  
  		this.sentSubscription = subscriptionMessage;
  		log.info("Sent {}", subscriptionMessage);
  	}
docs: Called after a subscription request message is sent to the aggregator.
  
  @param session
  the session on which the message was sent.
  @param subscriptionMessage
  the sent message.