code: 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);
      }
docs: Adds the create new checkbox to the given field set.<p>
  
  @param elementBean the element bean
  @param fieldSet the field set