docs: private void addCreateNewCheckbox(CmsContainerElementData elementBean, CmsFieldSet fieldSet) {
  
          m_createNewCheckBox = new CmsCheckBox(Messages.get().key(Messages.GUI_CREATE_NEW_LABEL_0));
          m_createNewCheckBox.setDisplayInline(false);
          m_createNewCheckBox.getElement().getStyle().setMarginTop(7, Style.Unit.PX);
          m_createNewCheckBox.setChecked(elementBean.isCreateNew());
          fieldSet.add(m_createNewCheckBox);
      }