code: public Element getSynonymCatalogsElement() {
          final Element referenceDataCatalogElement = getReferenceDataCatalogElement();
  
          final Element synonymCatalogsElement =
                  getOrCreateChildElementByTagName(referenceDataCatalogElement, "synonym-catalogs");
          if (synonymCatalogsElement == null) {
              throw new IllegalStateException("Could not find <synonym-catalogs> element in configuration file");
          }
          return synonymCatalogsElement;
      }
docs: Gets the XML element that represents the synonym catalogs
  
  @return