TaskProvider<RenderMarkdown> releaseNotesMarkdown = tasks.register("releaseNotesMarkdown", RenderMarkdown.class, task -> {
            task.setGroup("release notes");
            task.setDescription("Generate release notes HTML page from Markdown.");

            task.getInputEncoding().convention(Charset.defaultCharset().name());
            task.getOutputEncoding().convention(Charset.defaultCharset().name());

        this.setAlias(p.getAlias());
        this.setName(p.getName());
        this.setRequired(p.isRequired());
        this.setEditable(p.isEditable());
        this.setDescription(p.getDescription());
        this.setExpression(p.getExpression());
        this.setDeprecated(p.getDeprecated());
        this.setDefaultValue(p.getDefaultValue());
        this.setType(p.getType());

        this.setGoalPrefix(original.getGoalPrefix());
        this.setInheritedByDefault(original.isInheritedByDefault());
        this.setName(original.getName());
        this.setDescription(original.getDescription());
        this.setRequiredMavenVersion(original.getRequiredMavenVersion());
        this.setRequiredJavaVersion(original.getRequiredJavaVersion());

    {
        Model target = new Model();
        target.setDescription( "TARGET" );

        Model source = new Model();
        source.setDescription( "SOURCE" );

        modelMerger.merge( target, source, true, null );
        assertThat( target.getDescription(), is( "SOURCE" ) );

        target.setDescription( "TARGET" );
        modelMerger.merge( target, source, false, null );

            task.into(flattenedAsciidocDirectory);
        });

        TaskProvider<AsciidoctorTask> userguideSinglePageHtml = tasks.register("userguideSinglePageHtml", AsciidoctorTask.class, task -> {
            task.setDescription("Generates HTML single-page user manual.");
            configureForUserGuideSinglePage(task, extension, project);
            task.outputOptions(options -> options.setBackends(singletonList("html5")));

        }));
    }

    private void addUtilityTasks(TaskContainer tasks, GradleDocumentationExtension extension) {
        tasks.register("serveDocs", ServeDocs.class, task -> {
            task.setDescription("Runs a local webserver to serve generated documentation.");
            task.setGroup("documentation");

            int webserverPort = 8000;
            task.getJavaLauncher().set(

        registerModifiedProperty("createdTime");
        this.createdTime = value;
    }

    public String getDescription() {
        checkSpecifiedProperty("description");
        return convertEmptyToNull(description);
    }

    public void setDescription(String value) {
        registerModifiedProperty("description");
        this.description = value;
    }

        TaskProvider<Docbook2Xhtml> dslHtml = tasks.register("dslHtml", Docbook2Xhtml.class, task -> {
            task.setGroup("documentation");
            task.setDescription("Generates DSL reference HTML documentation.");
            task.onlyIf(t -> !extension.getQuickFeedback().get());

            task.source(dslStandaloneDocbook);

                .desc("<deprecated> Use Maven 2 Legacy Local Repository behaviour.")
                .deprecated(DeprecatedAttributes.builder()
                        .setSince("3.9.1")
                        .setDescription("UNSUPPORTED: Use of this option will make Maven invocation fail.")
                        .get())
                .build());

        // Deprecated

        pluginDescriptor.setVersion(extractVersion(c));
        pluginDescriptor.setGoalPrefix(extractGoalPrefix(c));

        pluginDescriptor.setName(extractName(c));
        pluginDescriptor.setDescription(extractDescription(c));

        pluginDescriptor.setIsolatedRealm(extractIsolatedRealm(c));
        pluginDescriptor.setInheritedByDefault(extractInheritedByDefault(c));