docs: public Hours toStandardHours() {
          checkYearsAndMonths("Hours");
          long millis = getMillis();  // assign to a long
          millis += ((long) getSeconds()) * DateTimeConstants.MILLIS_PER_SECOND;
          millis += ((long) getMinutes()) * DateTimeConstants.MILLIS_PER_MINUTE;
          long hours = millis / DateTimeConstants.MILLIS_PER_HOUR;
          hours = FieldUtils.safeAdd(hours, getHours());
          hours = FieldUtils.safeAdd(hours, ((long) getDays()) * ((long) DateTimeConstants.HOURS_PER_DAY));
          hours = FieldUtils.safeAdd(hours, ((long) getWeeks()) * ((long) DateTimeConstants.HOURS_PER_WEEK));
          return Hours.hours(FieldUtils.safeToInt(hours));
      }