docs: private void createDayPanel() {
  
          CmsCheckBox box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_MONDAY_0));
          box.setInternalValue(WeekDay.MONDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
          box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_TUESDAY_0));
          box.setInternalValue(WeekDay.TUESDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
          box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_WEDNESDAY_0));
          box.setInternalValue(WeekDay.WEDNESDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
          box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_THURSDAY_0));
          box.setInternalValue(WeekDay.THURSDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
          box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_FRIDAY_0));
          box.setInternalValue(WeekDay.FRIDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
          box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_SATURDAY_0));
          box.setInternalValue(WeekDay.SATURDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
          box = new CmsCheckBox(Messages.get().key(Messages.GUI_SERIALDATE_DAY_SUNDAY_0));
          box.setInternalValue(WeekDay.SUNDAY.toString());
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          box.addValueChangeHandler(m_checkBoxValueChangeHandler);
          m_checkboxes.add(box);
          m_dayPanel.add(box);
      }