code: function unsubscribe(message) {
  		reply(proto.writeUnsubscribe(message.id));
  		subscritions[message.itemName] = undefined;
  		dequeueSubUnsubRequest(message.itemName);
  		handleLateSubUnsubRequests(message.itemName);
  		fireFirstSubUnsubEvent(message.itemName);
  	}
docs: Sends an unsubscribe reply
  
  @param {Object} message the decoded request message
  @private