task.getDestFile().convention(dslReference.getStagingRoot().file("index.xml"));
        });

        Configuration userGuideTask = project.getConfigurations().create("userGuideTask");
        Configuration userGuideStyleSheetConf = project.getConfigurations().create("userGuideStyleSheets");

        TaskProvider<Docbook2Xhtml> dslHtml = tasks.register("dslHtml", Docbook2Xhtml.class, task -> {

        extension.getCssFiles().from(css);

        extension.getRenderedDocumentation().from(stageDocs);

        Configuration runtimeClasspath = project.getConfigurations().getByName("runtimeClasspath");
        Configuration sourcesPath = project.getConfigurations().create("sourcesPath");
        sourcesPath.attributes(a -> {
            a.attribute(Usage.USAGE_ATTRIBUTE, objects.named(Usage.class, Usage.JAVA_RUNTIME));

        });

        Configuration jquery = project.getConfigurations().create("jquery", conf -> {
            conf.setDescription("JQuery dependencies embedded by release notes.");
        });

        extension.releaseNotes(releaseNotes -> {

    } // -- void addExecution( Execution )

    /**
     * Get configuration to pass to all goals run in this phase.
     *
     * @return Object
     */
    public Object getConfiguration() {
        return this.configuration;
    } // -- Object getConfiguration()

    /**
     * Method getExecutions.
     *
     * @return List
     */
    public java.util.List<Execution> getExecutions() {

     *
     * @return The configuration to unmarshal into the bean or {@code null} if none.
     */
    Object getConfiguration();

    /**
     * Sets the configuration to unmarshal into the bean. The configuration should be taken from
     * {@link org.apache.maven.model.ConfigurationContainer#getConfiguration()} or a similar source.
     * Fully equivalent to {@code setConfiguration(configuration, null)}.
     *

        for (Plugin plugin : plugins) {
            XmlNode pluginConfiguration = plugin.getDelegate().getConfiguration();

            if (pluginConfiguration != null) {
                for (PluginExecution execution : plugin.getExecutions()) {
                    XmlNode executionConfiguration = execution.getDelegate().getConfiguration();
                    executionConfiguration = XmlNode.merge(executionConfiguration, pluginConfiguration);

            Xpp3Dom config0 = (Xpp3Dom) jdks.getToolchains().get(0).getConfiguration();
            assertEquals("lib/tools.jar", config0.getChild("toolsJar").getValue());
            assertEquals(2, config0.getChildCount());
            Xpp3Dom config1 = (Xpp3Dom) jdks.getToolchains().get(1).getConfiguration();
            assertEquals(2, config1.getChildCount());

    }

    @Override
    public String getGoal() {
        return delegate.getGoal();
    }

    @Override
    public Optional<XmlNode> getConfiguration() {
        return Optional.of(delegate.getConfiguration()).map(Xpp3Dom::getDom);
    }

    @Override
    public String toString() {
        return delegate.toString();
    }

    @Nonnull
    String getExecutionId();

    @Nonnull
    String getGoal();

    @Nonnull
    String getLifecyclePhase();

    @Nonnull
    Optional<XmlNode> getConfiguration();

                    if (pluginExecutionId.equals(execution.getId())) {
                        setConfiguration(execution.getConfiguration());
                        break;
                    }
                }
            } else {
                setConfiguration(plugin.getConfiguration());
            }
        }
        return this;
    }