code: public JodaWorkingWeek withWorkingDayFromDateTimeConstant(final boolean working, final int givenDayOfWeek) {
          final int dayOfWeek = jodaToCalendarDayConstant(givenDayOfWeek);
          return new JodaWorkingWeek(super.withWorkingDayFromCalendar(working, dayOfWeek));
      }
docs: Return a new JodaWorkingWeek if the status for the given day has changed.
  
  @param working
  true if working day
  @param givenDayOfWeek
  e.g. DateTimeConstants.MONDAY, DateTimeConstants.TUESDAY, etc