+ cause.getMessage(),
                cause);
        // Convert to old type
        CoreExtension oldExtension = new CoreExtension();
        oldExtension.setGroupId(extension.getGroupId());
        oldExtension.setArtifactId(extension.getArtifactId());
        oldExtension.setVersion(extension.getVersion());
        if (extension.getClassLoadingStrategy() != null) {

        {
            if ( d.getExclusions() != null )
            {
                for ( Exclusion e : d.getExclusions() )
                {
                    exclusions.add(  e.getGroupId() + ":" + e.getArtifactId() );
                }
            }
        }

        ArtifactFilter scopeFilter = new ScopeArtifactFilter( scope );

        ArtifactFilter filter;

    private final Artifact parent;

    public AttachedArtifact(Artifact parent, String type, String classifier, ArtifactHandler artifactHandler) {
        super(
                parent.getGroupId(),
                parent.getArtifactId(),
                parent.getVersionRange(),
                parent.getScope(),
                type,
                classifier,
                artifactHandler,

        super(path);
        this.groupId = groupId;
        this.artifactId = artifactId;
        this.version = version;
        this.hashCode = Objects.hash(groupId, artifactId, version);
    }

    public String getGroupId() {
        return groupId;
    }

    public String getArtifactId() {
        return artifactId;
    }

    public String getVersion() {
        return version;
    }

    @Override

                    @Override
                    public List<Plugin> plugins() {
                        return Collections.singletonList(Plugin.newBuilder()
                                .groupId(pluginDescriptor.getGroupId())
                                .artifactId(pluginDescriptor.getArtifactId())
                                .version(pluginDescriptor.getVersion())
                                .configuration(phase.getConfiguration())

    }

    @Nonnull
    default ArtifactCoordinates create(@Nonnull Session session, Artifact artifact) {
        return create(ArtifactCoordinatesFactoryRequest.build(
                session,
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion().toString(),
                artifact.getClassifier(),
                artifact.getExtension(),
                null));
    }

 *
 * @since 3.0
 */
public interface PluginVersionRequest {

    /**
     * Gets the group id of the plugin.
     *
     * @return The group id of the plugin.
     */
    String getGroupId();

    /**
     * Sets the group id of the plugin.
     *
     * @param groupId The group id of the plugin.
     * @return This request, never {@code null}.
     */

        return null;
    }

    public static MojoDescriptor createMojoDescriptor(Plugin plugin) {
        final PluginDescriptor descriptor = new PluginDescriptor();
        descriptor.setGroupId(plugin.getGroupId());
        descriptor.setArtifactId(plugin.getArtifactId());
        descriptor.setPlugin(plugin);
        descriptor.setVersion(plugin.getVersion());
        final MojoDescriptor mojoDescriptor = new MojoDescriptor();

                .forEach(plugin -> plugin.getExecutions().forEach(exec -> exec.getGoals()
                        .forEach(goal -> goals.computeIfAbsent(phase.name(), n -> new ArrayList<>())
                                .add(plugin.getGroupId() + ":" + plugin.getArtifactId() + ":" + plugin.getVersion()
                                        + ":" + goal)))));
        return goals.entrySet().stream()

        });

        TaskProvider<AsciidoctorTask> userguideMultiPage = tasks.register("userguideMultiPage", AsciidoctorTask.class, task -> {
            task.setGroup("documentation");
            task.setDescription("Generates multi-page user manual.");
            task.dependsOn(extension.getUserManual().getStagedDocumentation());

            task.sources(patternSet -> {