docs: public static Weeks weeksBetween(ReadablePartial start, ReadablePartial end) {
          if (start instanceof LocalDate && end instanceof LocalDate)   {
              Chronology chrono = DateTimeUtils.getChronology(start.getChronology());
              int weeks = chrono.weeks().getDifference(
                      ((LocalDate) end).getLocalMillis(), ((LocalDate) start).getLocalMillis());
              return Weeks.weeks(weeks);
          }
          int amount = BaseSingleFieldPeriod.between(start, end, ZERO);
          return Weeks.weeks(amount);
      }