return "true";
            }

            @Override
            public String getResponseFieldContentDescription() {
                return "content_description";
            }

            @Override
            public String getResponseFieldContentTitle() {
                return "content_title";
            }

            @Override

        final Map<String, Object> doc = new HashMap<>();
        doc.put("title", "Test Title");
        doc.put("url", "https://example.com");
        doc.put("doc_id", "doc-123");
        doc.put("content_description", "Test snippet");

        final ChatSource source = new ChatSource(5, doc);

        assertEquals(5, source.getIndex());
        assertEquals("Test Title", source.getTitle());

            }
            this.title = titleValue;
            this.url = toStringOrNull(doc.get("url"));
            this.docId = toStringOrNull(doc.get("doc_id"));
            this.snippet = toStringOrNull(doc.get("content_description"));
            this.urlLink = toStringOrNull(doc.get("url_link"));
        }

        private static String toStringOrNull(final Object value) {
            if (value == null) {
                return null;

            final String content = getStringValue(doc, "content");
            final String description = getStringValue(doc, "content_description");
            String descText = StringUtil.isNotBlank(content) ? content : description;
            descText = sanitizeDocumentContent(stripHtmlTags(descText));