/** The key of the message: Search Log */
    public static final String LABELS_SEARCH_LOG = "{labels.searchLog}";

    /** The key of the message: Sort */
    public static final String LABELS_SORT = "{labels.sort}";

    /** The key of the message: Start */
    public static final String LABELS_START = "{labels.start}";

    /** The key of the message: Login Required */

    /** The key of the message: The specified sort {0} is invalid. */
    public static final String ERRORS_invalid_query_sort_value = "{errors.invalid_query_sort_value}";

    /** The key of the message: The specified sort {0} is unsupported. */

                searchRequestBuilder.setFetchSource(responseFields, null);
            }

            // rescorer
            buildRescorer(queryHelper, queryFieldConfig, fessConfig);

            // sort
            buildSort(queryContext, queryFieldConfig, fessConfig);

            // highlighting
            if (highlightInfo != null) {
                buildHighlighter(queryHelper, queryFieldConfig, fessConfig);