code: public static <T extends CatalogType> void getSortedCatalogItems(CatalogMap<T> items, String sortFieldName, List<T> result) {
          result.addAll(getSortedCatalogItems(items, sortFieldName    ));
      }
docs: A getSortedCatalogItems variant with the result list filled in-place
  @param <T> The type of item to sort.
  @param items The set of catalog items.
  @param sortFieldName The name of the field to sort on.
  @param result An output list of catalog items, sorted on the specified field.