public void mergeGroupId()
    {
        Model target = new Model();
        target.setGroupId( "TARGET" );

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

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

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

        return groups.equals(that.groups);

    }

    @Override
    public int hashCode() {
        return hashCode;
    }

    @Override
    public Set<String> getGroups() {
        return groups;
    }

    @Override
    public boolean excludes(ModuleIdentifier module) {
        return groups.contains(module.getGroup());
    }

    @Override

        Metadata metadata = new Metadata();
        metadata.setModelVersion("1.1.0");
        metadata.setGroupId(groupId);
        metadata.setArtifactId(artifactId);
        metadata.setVersion(version);

        Snapshot snapshot = new Snapshot();
        snapshot.setLocalCopy(true);

    public void execute(ProjectInternal project) {
        project.getTasks().register("javaToolchains", ShowToolchainsTask.class, task -> {
            task.setDescription("Displays the detected java toolchains.");
            task.setGroup(HelpTasksPlugin.HELP_GROUP);
            task.setImpliesSubProjects(true);
        });
    }

            init( af );
        }
        */
    }
    // ------------------------------------------------------------------
    //    public void init( ArtifactMetadata af )
    //    {
    //        setGroupId( af.getGroupId() );
    //        setArtifactId( af.getArtifactId() );
    //        setVersion( af.getVersion() );
    //        setType( af.getType() );
    //        setScope( af.getScope() );

        // Only useful for the root project
        if (project.getParent() == null) {
            project.getTasks().register(TASK_NAME, UpdateDaemonJvm.class, task -> {
                task.setGroup("Build Setup");
                task.setDescription("Generates or updates the Gradle Daemon JVM criteria.");

    //
    // ----------------------------------------------------------------------

    public PluginDescriptor() {}

    public PluginDescriptor(PluginDescriptor original) {
        this.setGroupId(original.getGroupId());
        this.setArtifactId(original.getArtifactId());
        this.setVersion(original.getVersion());
        this.setGoalPrefix(original.getGoalPrefix());

    }

    @Test
    void testDependencies() {
        DependencyManagement dm = new DependencyManagement();
        Dependency d1 = new Dependency();
        d1.setGroupId("myGroupId");
        assertNotNull(dm.getDependencies());
        assertEquals(0, dm.getDependencies().size());
        dm.addDependency(d1);
        assertNotNull(dm.getDependencies());

            plugins = Collections.emptySet();
        }

        return plugins;
    }

    private Plugin newPlugin(String artifactId, String... goals) {
        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {
            PluginExecution pluginExecution = new PluginExecution();

        request.setPom(project.getModel());

        try {
            PluginPrefixResult result = pluginPrefixResolver.resolve(request);

            Plugin plugin = new Plugin();
            plugin.setGroupId(result.getGroupId());
            plugin.setArtifactId(result.getArtifactId());

            return plugin;
        } catch (NoPluginFoundForPrefixException e) {
            return null;
        }
    }