docs: public DateTimeZoneBuilder addRecurringSavings(String nameKey, int saveMillis,
                                                     int fromYear, int toYear,
                                                     char mode,
                                                     int monthOfYear,
                                                     int dayOfMonth,
                                                     int dayOfWeek,
                                                     boolean advanceDayOfWeek,
                                                     int millisOfDay)
      {
          if (fromYear <= toYear) {
              OfYear ofYear = new OfYear
                  (mode, monthOfYear, dayOfMonth, dayOfWeek, advanceDayOfWeek, millisOfDay);
              Recurrence recurrence = new Recurrence(ofYear, nameKey, saveMillis);
              Rule rule = new Rule(recurrence, fromYear, toYear);
              getLastRuleSet().addRule(rule);
          }
          return this;
      }