code: private I_CmsFacetQueryItem parseFacetQueryItem(final String prefix) {
  
          I_CmsXmlContentValue query = m_xml.getValue(prefix + XML_ELEMENT_QUERY_FACET_QUERY_QUERY, m_locale);
          if (null != query) {
              String queryString = query.getStringValue(null);
              I_CmsXmlContentValue label = m_xml.getValue(prefix + XML_ELEMENT_QUERY_FACET_QUERY_LABEL, m_locale);
              String labelString = null != label ? label.getStringValue(null) : null;
              return new CmsFacetQueryItem(queryString, labelString);
          } else {
              return null;
          }
      }
docs: Parses a single query facet item with query and label.
  @param prefix path to the query facet item (with trailing '/').
  @return the query facet item.