int32_t PersianCalendar::defaultCenturyStartYear() const {
    // lazy-evaluate systemDefaultCenturyStartYear
    umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
    return gSystemDefaultCenturyStartYear;
}
int32_t PersianCalendar::defaultCenturyStartYear() const {
     
    umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
    return gSystemDefaultCenturyStartYear;
}