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

            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");

					<a class="link" href="${doc.url_link}" data-uri="${doc.url_link}"
						data-id="${doc.doc_id}" data-order="${s.index}">${doc.content_title}</a>
				</h3>
				<div class="body">
					<c:if test="${thumbnailSupport && !empty doc.thumbnail}">
					<div class="me-3">
						<a class="link d-none d-sm-flex" href="${doc.url_link}" data-uri="${doc.url_link}" data-id="${doc.doc_id}"
							data-order="${s.index}"

					<a class="link" href="${doc.url_link}" data-uri="${doc.url_link}"
						data-id="${doc.doc_id}" data-order="${s.index}">${doc.content_title}</a>
				</h3>
				<div class="body">
					<c:if test="${thumbnailSupport && !empty doc.thumbnail}">
					<div class="me-3">
						<a class="link d-none d-sm-flex" href="${doc.url_link}" data-uri="${doc.url_link}" data-id="${doc.doc_id}"
							data-order="${s.index}"

                                                <li class="col-sm-12">
                                                    <h3 class="title">
                                                        <a href="${doc.url_link}">${doc.content_title}</a>
                                                    </h3>
                                                    <div class="body col-sm-10">

            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 */