docs: private void removeOldValues() throws CmsException {
  
          Locale locale = getLocale();
          I_CmsXmlContentValue value = m_document.getValue(N_DETAIL_PAGE, locale);
          do {
              value = m_document.getValue(N_DETAIL_PAGE, locale);
              if (value != null) {
                  m_document.removeValue(value.getPath(), locale, 0);
              }
          } while (value != null);
      }