docs: private static String addTimeInfoToEvent(String message, Long currTime, int delayInMillis) {
      String eventTimeString =
          Long.toString((currTime - delayInMillis) / 1000 * 1000);
      // Add a (redundant) 'human-readable' date string to make the data semantics more clear.
      String dateString = GameConstants.DATE_TIME_FORMATTER.print(currTime);
      message = message + "," + eventTimeString + "," + dateString;
      return message;
    }