code: public static HijriCalendar of(
          String variant,
          int hyear,
          HijriMonth hmonth,
          int hdom
      ) {
  
          return HijriCalendar.of(variant, hyear, hmonth.getValue(), hdom);
  
      }
docs: /*[deutsch]
  <p>Erzeugt ein neues Hijri-Kalenderdatum in der angegebenen Variante. </p>
  
  @param   variant calendar variant
  @param   hyear   islamic year
  @param   hmonth  islamic month
  @param   hdom    islamic day of month
  @return  new instance of {@code HijriCalendar}
  @throws  ChronoException if given variant is not supported
  @throws  IllegalArgumentException in case of any inconsistencies
  @since   3.5/4.3