/**
     * Set the artifact ID of the extension.
     *
     * @param artifactId a artifactId object.
     */
    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    } // -- void setArtifactId( String )

    /**
     * Set the class loading strategy: 'self-first' (the default),
     * 'parent-first' (loads classes from the parent, then from the

                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) {
            oldExtension.setClassLoadingStrategy(extension.getClassLoadingStrategy());

        Parent parent = new Parent();

        parent.setGroupId("test-group");
        parent.setVersion("1000");
        parent.setArtifactId("test-artifact");

        Model model = new Model();

        model.setParent(parent);
        model.setArtifactId("real-artifact");

        MavenProject project = new MavenProject(model);

        projectManager = new DefaultProjectManager(session, artifactManager);

        mavenProject.setGroupId("myGroup");
        mavenProject.setArtifactId("myArtifact");
        mavenProject.setVersion("1.0-SNAPSHOT");
        when(artifact.getGroupId()).thenReturn("myGroup");
        when(artifact.getArtifactId()).thenReturn("myArtifact");

        parent.setArtifactId(parentProject.getArtifactId());
        project.getModel().setParent(parent);
        return project;
    }

    private MavenProject getMavenProject(String artifactId) {
        MavenProject mavenProject = new MavenProject();
        mavenProject.setGroupId(GROUP_ID);
        mavenProject.setArtifactId(artifactId);
        mavenProject.setVersion("1.0");

        //
        // We should get a whole slew of dependencies resolving this artifact transitively
        //
        Dependency d = new Dependency();
        d.setGroupId("org.apache.maven.its");
        d.setArtifactId("b");
        d.setVersion("0.1");
        d.setScope(Artifact.SCOPE_COMPILE);
        Artifact artifact = repositorySystem.createDependencyArtifact(d);

                coreExtension.setGroupId(interpolatedTrimmed(parser.nextText(), "groupId"));
            } else if (checkFieldWithDuplicate(parser, "artifactId", null, parsed)) {
                coreExtension.setArtifactId(interpolatedTrimmed(parser.nextText(), "artifactId"));
            } else if (checkFieldWithDuplicate(parser, "version", null, parsed)) {
                coreExtension.setVersion(interpolatedTrimmed(parser.nextText(), "version"));