public void writePlan(BuildPlan plan) {
        if (logger.isDebugEnabled()) {
            writePlan(logger::debug, plan);
        }
    }

    public void writePlan(BuildPlan plan, MavenProject project) {
        if (logger.isDebugEnabled()) {
            writePlan(logger::debug, plan, project);
        }
    }

    public void writePlan(Consumer<String> writer, BuildPlan plan) {

        Map<MavenProject, List<MavenProject>> projects = Collections.singletonMap(project, Collections.emptyList());

        BuildPlan plan = calculateLifecycleMappings(projects, "package");

        new BuildPlanLogger().writePlan(System.out::println, plan);
    }

    @Test
    void testCondense() {
        MavenProject p1 = new MavenProject();
        p1.setCollectedProjects(List.of());
        p1.setArtifactId("p1");