* @param requestedTime the requested time from the search
     * @param order the order index of the document
     * @return the go URL, or null if docId or queryId is null
     */
    protected String buildGoUrl(final String contextPath, final String docId, final String queryId, final long requestedTime,
            final int order) {
        if (docId == null || queryId == null) {
            return null;
        }