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

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

                        g1, a1, v1, g2, a2, v2);
            }
            throw new IllegalArgumentException(message);
        }
        getMavenProject(project)
                .addAttachedArtifact(
                        RepositoryUtils.toArtifact(getSession(project).toArtifact(artifact)));
        artifactManager.setPath(artifact, path);
    }

    @Nonnull
    @Override

     * @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
        int index = attachedArtifacts.indexOf(artifact);
        if (index >= 0) {