// effective model.
        //
        // As of 3.4, the model version is mandatory even in raw models. The XML element still is optional in the
        // XML schema and this will not change anytime soon. We do not want to build effective models based on
        // models without a version starting with 3.4.

     * coordinates.
     *
     * @param artifact the artifact to add or replace.
     * @deprecated Please use {@link MavenProjectHelper}
     * @throws DuplicateArtifactAttachmentException will never happen but leave it for backward compatibility
     */
    public void addAttachedArtifact(Artifact artifact) throws DuplicateArtifactAttachmentException {
        // if already there we remove it and add again

        if (!VALID_MODEL_VERSIONS.contains(superModelVersion)) {
            // Maven 3.x is always using 4.0.0 version to load the supermodel, so
            // do the same when loading a dependency.  The model validator will also
            // check that field later.
            superModelVersion = "4.0.0";
        }
        ModelData superData = new ModelData(null, getSuperModel(superModelVersion));

        // profile activation

    void setUp() throws Exception {
        testDirectory = new File(getBasedir(), BASE_POM_DIR);
        new File(getBasedir(), BASE_MIXIN_DIR);
        EmptyLifecycleBindingsInjector.useEmpty();
    }

    /**
     * Will throw exception if url is empty. MNG-4050
     *
     * @throws Exception in case of issue
     */
    @Test
    void testEmptyUrl() throws Exception {
        buildPom("empty-distMng-repo-url");
    }

    /**

            // the pool core size will be incremented before submitting
            // all the tasks, then the thread will block waiting for all
            // those subtasks to finish.
            // This ensures the number of running workers is no more than
            // the defined parallism, while making sure the pool will not
            // be exhausted
            //