docs: public static TimeDuration minus(final Date lhs, final Date rhs) {
          long milliseconds = lhs.getTime() - rhs.getTime();
          long days = milliseconds / (24 * 60 * 60 * 1000);
          milliseconds -= days * 24 * 60 * 60 * 1000;
          int hours = (int) (milliseconds / (60 * 60 * 1000));
          milliseconds -= hours * 60 * 60 * 1000;
          int minutes = (int) (milliseconds / (60 * 1000));
          milliseconds -= minutes * 60 * 1000;
          int seconds = (int) (milliseconds / 1000);
          milliseconds -= seconds * 1000;
  
          return new TimeDuration((int) days, hours, minutes, seconds, (int) milliseconds);
      }