*
     * @param queryId the unique identifier for the search query
     * @return an array of document IDs, or an empty array if not found
     */
    public String[] getResultDocIds(final String queryId) {
        return LaRequestUtil.getOptionalRequest().map(req -> req.getSession(false)).map(session -> {
            final Map<String, String[]> resultUrlCache = getResultDocIdsCache(session);