docs: public YearMonthDay withChronologyRetainFields(Chronology newChronology) {
          newChronology = DateTimeUtils.getChronology(newChronology);
          newChronology = newChronology.withUTC();
          if (newChronology == getChronology()) {
              return this;
          } else {
              YearMonthDay newYearMonthDay = new YearMonthDay(this, newChronology);
              newChronology.validate(newYearMonthDay, getValues());
              return newYearMonthDay;
          }
      }