final ChatSource source = new ChatSource();

        assertNull(source.getUrl());
        assertNull(source.getTitle());
        assertNull(source.getSnippet());

        source.setUrl("https://example.com");
        source.setTitle("Example Page");
        source.setSnippet("This is a snippet...");

        assertEquals("https://example.com", source.getUrl());

        final Map<String, Object> source1 = new LinkedHashMap<>();
        source1.put("url", "https://example.com/page.html");
        source1.put("title", "First");
        source1.put("content", "First content");

        final Map<String, Object> source2 = new LinkedHashMap<>();
        source2.put("url", "https://example.com/page.html");
        source2.put("title", "Second");

        String type1 = event.getEventType();
        String type2 = event.getEventType();
        assertEquals(type1, type2);

        Map<String, Object> source1 = event.toSource();
        Map<String, Object> source2 = event.toSource();
        assertSame(source1, source2);
    }

    // Test edge cases for version numbers
    @Test
    public void test_versionNumberEdgeCases() {

    }

    /**
     * Adds a source to the message.
     *
     * @param source the source to add
     */
    public void addSource(final ChatSource source) {
        if (sources == null) {
            sources = new ArrayList<>();
        }
        sources.add(source);
    }

    /**
     * Checks if this is a user message.
     *
     * @return true if this is a user message

							<directory>${packaging.fess.lib.dir}/classes</directory>
							<sources>
								<source>
									<location>${project.build.directory}/tomcat-lib</location>
								</source>
							</sources>
						</mapping>
						<mapping>
							<directory>${packaging.fess.lib.dir}/classes/org/codelibs/fess</directory>
							<sources>
								<source>

    }

    /**
     * Add sources to a message (card style)
     */
    function addSourcesToMessage(messageElement, sources) {
        var html = '<div class="message-sources"><h6>' + escapeHtml(config.labels.sources) + '</h6><ul class="source-list">';

        for (var i = 0; i < sources.length; i++) {
            var source = sources[i];
            var title = source.title || source.url || ('Source ' + (i + 1));

        final ChatMessage.ChatSource source = new ChatMessage.ChatSource(1, doc);
        assertEquals("http://proxy.example.com/file.doc", source.getUrlLink());
        assertNull(source.getGoUrl());

        source.setGoUrl("/go/?rt=123&docId=doc123&queryId=q1&order=0");
        assertEquals("/go/?rt=123&docId=doc123&queryId=q1&order=0", source.getGoUrl());
    }

    }

    /**
     * Builds the source titles suffix string (e.g., "\n[Referenced documents: Title1, Title2]").
     * Returns an empty string if no sources or titles are available.
     *
     * @param sources the source documents
     * @return the source titles suffix, or empty string
     */
    private String buildSourceTitlesSuffix(final List<ChatSource> sources) {

}

.source-type {
    font-size: 0.6875rem;
    color: #6b778c;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.source-type i {
    font-size: 0.625rem;
}

/* Fallback for simple source links */
.source-link {
    font-size: 0.8125rem;
    color: #0052cc;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

                    final Map<String, Object> source = getMapValue(result, "_source");
                    if (source != null) {
                        final OperationInfo info = new OperationInfo();
                        info.name = getStringValue(source, "name");
                        info.instanceId = getStringValue(source, "instanceId");
                        info.hostname = getStringValue(source, "hostname");