code: public static Weekmodel of(
          Weekday firstDayOfWeek,
          int minimalDaysInFirstWeek
      ) {
  
          return Weekmodel.of(
              firstDayOfWeek,
              minimalDaysInFirstWeek,
              Weekday.SATURDAY,
              Weekday.SUNDAY
          );
  
      }
docs: /*[deutsch]
  <p>Erzeugt ein neues Wochenmodell mit den angegebenen Einstellungen
  und der Wochenenddefinition Samstag/Sonntag. </p>
  
  @param   firstDayOfWeek          localized first day of week
  @param   minimalDaysInFirstWeek  required minimum count of days for
  the first week of year in range (1-7)
  @return  specific week model with weekend on saturday and sunday
  @throws  IllegalArgumentException if any argument is out of range
  @see     #of(Locale)