getCalendarType = () => {
    if (calendarType === undefined) {
      calendarType = (0, _InitialConfiguration.getCalendarType)();
    }
    if (calendarType && calendarType in _CalendarType.default) {
      return calendarType;
    }
    return _CalendarType.default.Gregorian;
  }
Returns the configured or default calendar type.
@public
@returns { CalendarType } the effective calendar type