code: private void checkExactlyTheWeeksCheckBoxes(Collection<WeekOfMonth> weeksToCheck) {
  
          for (CmsCheckBox cb : m_checkboxes) {
              cb.setChecked(weeksToCheck.contains(WeekOfMonth.valueOf(cb.getInternalValue())));
          }
      }
docs: Check exactly the week check-boxes representing the given weeks.
  @param weeksToCheck the weeks selected.