code: public Element getDatastoreCatalogElement() {
          final Element configurationFileDocumentElement = getDocumentElement();
  
          final Element datastoreCatalogElement =
                  getOrCreateChildElementByTagName(configurationFileDocumentElement, "datastore-catalog");
          if (datastoreCatalogElement == null) {
              throw new IllegalStateException("Could not find <datastore-catalog> element in configuration file");
          }
          return datastoreCatalogElement;
      }
docs: Gets the XML element that represents the {@link DatastoreCatalog}.
  
  @return