code: public PushedNotification sendNotification(Device device, Payload payload) throws CommunicationException {
  		return sendNotification(device, payload, true);
  	}
docs: Send a notification to a single device and close the connection.
  
  @param device the device to be notified
  @param payload the payload to send
  @return a pushed notification with details on transmission result and error (if any)
  @throws CommunicationException thrown if a communication error occurs