* Retrieves and deserializes search parameters from browser cookies.
     *
     * @return Array of request parameters from the cookie, or empty array if none found
     */
    public RequestParameter[] getSearchParameters() {
        return LaRequestUtil.getOptionalRequest().map(req -> {
            final FessConfig fessConfig = ComponentUtil.getFessConfig();
            final String cookieName = fessConfig.getCookieSearchParameterName();