}
                return option.setFetchSource(new String[] { fessConfig.getIndexFieldUrl(), fessConfig.getIndexFieldLang() }, null);
            }, (builder, hit) -> {
                try {
                    final Map<String, Object> doc = hit.getSourceAsMap();
                    final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
                    if (StringUtil.isNotBlank(url)) {