docs: public List<String> getButtonBarOption() {
  
          if (m_buttonBarOption == null) {
              // use lazy initializing for performance reasons
              if (CmsStringUtil.isEmpty(getButtonBarOptionString())) {
                  // no individual configuration defined, create empty list
                  m_buttonBarOption = Collections.emptyList();
              } else {
                  // create list of button bar options from configuration string
                  m_buttonBarOption = CmsStringUtil.splitAsList(getButtonBarOptionString(), DELIMITER_VALUE, true);
              }
          }
          return m_buttonBarOption;
      }