*/
        public String getUrlLink() {
            return urlLink;
        }

        /**
         * Sets the ViewHelper-processed URL for display.
         *
         * @param urlLink the URL link
         */
        public void setUrlLink(final String urlLink) {
            this.urlLink = urlLink;
        }

        /**
         * Gets the go link URL for navigation.

            doc.put("doc_id", existingDoc.get("doc_id"));
            doc.put("title", existingDoc.get("title") + "_updated");
            doc.put("url", existingDoc.get("url_link"));
            doc.put("content", "Updated content");
            doc.put("boost", 2.0f);
            doc.put("role", "Rguest");
            documents.add(doc);
        }

            public String getResponseFieldSitePath() {
                return "site_path";
            }

            @Override
            public String getResponseFieldUrlLink() {
                return "url_link";
            }

            @Override
            public String getIndexFieldExpires() {
                return "expires";
            }

            @Override

    }

    // ========== ChatSource goUrl/urlLink tests ==========

    @Test
    public void test_chatSource_goUrlAndUrlLink() {
        final Map<String, Object> doc = new HashMap<>();
        doc.put("title", "Test Doc");
        doc.put("url", "smb://server/share/file.doc");
        doc.put("doc_id", "doc123");
        doc.put("url_link", "http://proxy.example.com/file.doc");

            public String getResponseFieldSitePath() {
                return "site_path";
            }

            @Override
            public String getResponseFieldUrlLink() {
                return "url_link";
            }

            @Override
            public String getIndexFieldExpires() {
                return "expires";
            }

            @Override

            source.setGoUrl(buildGoUrl(contextPath, source.getDocId(), queryId, requestedTime, i));
            assistantMessage.addSource(source);
        }
    }

    /**
     * Populates the url_link field in the document map if not already present.
     *
     * @param doc the document map
     */
    protected void populateUrlLink(final Map<String, Object> doc) {

response.field.content_title=content_title
# Field name for content description in the response.
response.field.content_description=content_description
# Field name for URL link in the response.
response.field.url_link=url_link
# Field name for site path in the response.
response.field.site_path=site_path
# Maximum length of content title in the response.
response.max.title.length=50
# Maximum length of site path in the response.

    /** The key of the configuration. e.g. content_description */
    String RESPONSE_FIELD_content_description = "response.field.content_description";

    /** The key of the configuration. e.g. url_link */
    String RESPONSE_FIELD_url_link = "response.field.url_link";

    /** The key of the configuration. e.g. site_path */
    String RESPONSE_FIELD_site_path = "response.field.site_path";

    /** The key of the configuration. e.g. 50 */

        assertEquals(sitePath, viewHelper.getSitePath(docMap));

        urlLink = "file:/home/user/";
        sitePath = "/home/user/";
        docMap.put(fieldName, urlLink);
        assertEquals(sitePath, viewHelper.getSitePath(docMap));

        urlLink = "file://home/user/";
        sitePath = "/home/user/";
        docMap.put(fieldName, urlLink);

            var source = sources[i];
            var title = source.title || source.url || ('Source ' + (i + 1));
            var navigationUrl = sanitizeUrl(source.goUrl || source.urlLink || source.url);
            var icon = getFileTypeIcon(source.url, source.mimetype);
            var typeLabel = getFileTypeLabel(source.url, source.mimetype);

            html += '<li>' +