assertNotNull(plan);
        assertIsSuccessor(plan.requiredStep(p, "before:all"), plan.requiredStep(p, "before:each"));
        assertIsSuccessor(plan.requiredStep(p, "before:all"), plan.requiredStep(c1, "before:all"));
        assertIsSuccessor(plan.requiredStep(p, "before:all"), plan.requiredStep(c2, "before:all"));
        assertIsSuccessor(plan.requiredStep(c1, "after:all"), plan.requiredStep(p, "after:all"));

                MavenProject project = step.project;
                phase.links().stream().forEach(link -> {
                    BuildStep before = plan.requiredStep(project, BEFORE + phase.name());
                    BuildStep after = plan.requiredStep(project, AFTER + phase.name());
                    Lifecycle.Pointer pointer = link.pointer();
                    String n2 = pointer.phase();

    }

    public Optional<BuildStep> step(MavenProject project, String name) {
        return Optional.ofNullable(plan.get(project)).map(m -> m.get(name));
    }

    public BuildStep requiredStep(MavenProject project, String name) {
        return step(project, name).orElseThrow(() -> new NoSuchElementException("Step " + name + " not found"));
    }

    // add a follow-up plan to this one