code: public static Years<Weekcycle> parseWeekBased(String period) throws ParseException {
  
          int amount = SingleUnitTimeSpan.parsePeriod(period, 'Y');
          return Years.ofWeekBased(amount);
  
      }
docs: /*[deutsch]
  <p>Wie {@code parseGregorian(period)}, aber mit wochenbasierten Jahren. </p>
  
  @param   period      the formatted string to be parsed
  @return  parsed instance
  @throws  ParseException if given argument cannot be parsed
  @see     #parseGregorian(String)
  @see     CalendarUnit#weekBasedYears()