protected abstract DirectoryProperty getDocsDirectory();

    @Input
    protected abstract Property<Integer> getPort();

    @Nested
    protected abstract Property<JavaLauncher> getJavaLauncher();

    @TaskAction
    public void startApplication() {
        System.out.println("serving docs at http://localhost:" + getPort().get());
        DeploymentRegistry registry = getDeploymentRegistry();

 */
public abstract class UserManual {
    /**
     * The root of the user manual documentation.  This is the source of the adoc files.
     */
    public abstract DirectoryProperty getRoot();

    /**
     * Source of snippets that can be inserted into the user manual
     */
    public abstract DirectoryProperty getSnippets();

    /**

        this.document = document;
        stack.addFirst(document.createElement("root"));
    }

    List<Element> getElements() {
        List<Element> elements = new ArrayList<Element>();
        for (Node node = stack.getLast().getFirstChild(); node != null; node = node.getNextSibling()) {
            elements.add((Element) node);
        }
        return elements;
    }

    public void appendChild(String text) {

                    .launcherFor(spec -> spec.getLanguageVersion().set(JavaLanguageVersion.of(21)))
            );
            task.getDocsDirectory().convention(extension.getDocumentationRenderedRoot());
            task.getPort().convention(webserverPort);

            task.dependsOn(extension.getRenderedDocumentation());
        });

        tasks.register("docs", task -> {
            task.setDescription("Generates all documentation");

            task.getSourceFile().convention(dslReference.getRoot().file("dsl.xml"));
            task.getPluginsMetaDataFile().convention(dslReference.getRoot().file("plugins.xml"));
            task.getClassDocbookDirectory().convention(dslReference.getRoot());
            task.getClassMetaDataFile().convention(dslMetaData.flatMap(ExtractDslMetaDataTask::getDestinationFile));

            task.getDocumentationFiles().from(extension.getUserManual().getRoot());
            task.getDocumentationRoot().convention(extension.getUserManual().getRoot());
            task.getDestinationDirectory().convention(layout.getBuildDirectory().dir("tmp/" + task.getName()));
        });

 */
public abstract class DslReference {
    /**
     * The root of the DSL documentation.  This is the source of the DSL XML currently.
     */
    public abstract DirectoryProperty getRoot();

    /**
     * The stylesheet directory used by the DSL reference documentation.
     */
    public abstract DirectoryProperty getStylesheetDirectory();

    /**