return null;
    }

    @Override
    protected String createFromHint() {
        return null;
    }

    @Override
    protected String createSqlSuffix() {
        return null;
    }

    @Override
    public void fetchFirst(int fetchSize) {
        _fetchScopeEffective = true;
        if (fetchSize < 0) {
            String msg = "Argument[fetchSize] should be plus: " + fetchSize;

        // Test with null message and valid cause
        TransportException nullMessageException = new TransportException(null, rootCause);
        assertNull(nullMessageException.getMessage());
        assertEquals(rootCause, nullMessageException.getCause());

        // Test with valid message and null cause
        TransportException nullCauseException = new TransportException(message, null);

                            null, "incomplete-project", null, "Should return null for missing groupId and version"),
                    Arguments.of("com.example", null, "1.0.0", "Should return null for missing artifactId"),
                    Arguments.of(null, null, "1.0.0", "Should return null for missing groupId and artifactId"),
                    Arguments.of("com.example", "test-project", null, "Should return null for missing version"),

        if (groupId == null || version == null) {
            Element parentElement = root.child(PARENT).orElse(null);
            if (parentElement != null) {
                if (groupId == null) {
                    groupId = parentElement.childTextTrimmed(MavenPomElements.Elements.GROUP_ID);
                }
                if (version == null) {

     * @return The extracted descriptor or {@code null} if no descriptor was found.
     * @throws IOException If the descriptor is present but could not be parsed.
     */
    public ExtensionDescriptor build(File extensionJar) throws IOException {
        ExtensionDescriptor extensionDescriptor = null;

        if (extensionJar.isFile()) {

    builder = builder.delete(null)
    builder = builder.put(requestBody)
    builder = builder.patch(requestBody)
    builder = builder.method("", requestBody)
    builder = builder.method("", null)
    builder = builder.tag("")
    builder = builder.tag(null)
    builder = builder.tag(String::class.java, "")
    builder = builder.tag(String::class.java, null)
    val request: Request = builder.build()

                coreExtension.setGroupId(interpolatedTrimmed(parser.nextText(), "groupId"));
            } else if (checkFieldWithDuplicate(parser, "artifactId", null, parsed)) {
                coreExtension.setArtifactId(interpolatedTrimmed(parser.nextText(), "artifactId"));
            } else if (checkFieldWithDuplicate(parser, "version", null, parsed)) {

     *
     * @param groupId the group identifier, or {@code null} is unspecified
     * @param artifactId the artifact identifier, or {@code null} is unspecified
     * @param version the artifact version, or {@code null} is unspecified
     * @param classifier the artifact classifier, or {@code null} is unspecified
     * @param extension the artifact extension, or {@code null} is unspecified

        final ComponentDef<?> componentDef = prototypeMap.get(name);
        if (componentDef != null) {
            return (T) componentDef.get();
        }
        final ComponentHolder<?> componentHolder = singletonMap.get(name);
        if (componentHolder != null) {
            return (T) componentHolder.get();
        }
        return null;
    }

    @Override
    public boolean available() {
        return available;

                treeResponse.service = "testService";
                treeResponse.shareIsInDfs = true;
            }
            return null;
        }).when(session).send(any(ServerMessageBlock.class), any(ServerMessageBlock.class));

        // Test tree connect
        tree.treeConnect(null, null);

        assertEquals(2, tree.connectionState);
        assertEquals(456, tree.tid);