*
     * @see MavenProject#addAttachedArtifact(org.apache.maven.artifact.Artifact)
     * @param project project reference.
     * @param artifact artifact to add or replace.
     */
    public void attachArtifact(MavenProject project, Artifact artifact) {
        project.addAttachedArtifact(artifact);
    }

    @Override
    public void addResource(

                    : Files.createTempFile(CONSUMER_POM_CLASSIFIER + "-", ".pom");
            deferDeleteFile(consumer);

            project.addAttachedArtifact(createConsumerPomArtifact(project, consumer, session));
        } else if (project.getModel().getDelegate().isRoot()) {
            throw new IllegalStateException(