docs: public DateTimeZoneBuilder addCutover(int year,
                                            char mode,
                                            int monthOfYear,
                                            int dayOfMonth,
                                            int dayOfWeek,
                                            boolean advanceDayOfWeek,
                                            int millisOfDay)
      {
          if (iRuleSets.size() > 0) {
              OfYear ofYear = new OfYear
                  (mode, monthOfYear, dayOfMonth, dayOfWeek, advanceDayOfWeek, millisOfDay);
              RuleSet lastRuleSet = iRuleSets.get(iRuleSets.size() - 1);
              lastRuleSet.setUpperLimit(year, ofYear);
          }
          iRuleSets.add(new RuleSet());
          return this;
      }