@SuppressWarnings("unchecked")
        final Set<String> highlightQueries = (Set<String>) params.getAttribute(Constants.HIGHLIGHT_QUERIES);
        if (highlightQueries != null) {
            final StringBuilder buf = new StringBuilder(100);
            highlightQueries.stream().forEach(q -> {
                buf.append("&hq=").append(LaFunctions.u(q));
            });