code: public void releaseMessage(Message message, int delay) throws IOException {
          releaseMessage(message.getId(), message.getReservationId(), new Long(delay));
      }
docs: Release reserved message after specified time. If there is no message with such id on the queue, an
  EmptyQueueException is thrown.
  
  @param message The message to release.
  @param delay The time after which the message will be released.
  
  @throws io.iron.ironmq.HTTPException If the IronMQ service returns a status other than 200 OK.
  @throws java.io.IOException If there is an error accessing the IronMQ server.