writer.accept("Build plan will be lazily computed");
        } else {
            plan.steps(project)
                    .filter(step ->
                            step.phase != null && step.executions().findAny().isPresent())
                    .sorted(Comparator.comparingInt(plan.sortedNodes()::indexOf))
                    .forEach(step -> {

    }

    @Override
    public <T> T lookup(Class<T> type) {
        return objects.stream()
                .filter(type::isInstance)
                .map(type::cast)
                .findAny()
                .orElseThrow(() -> new LookupException("No service of type " + type));
    }

    @Override
    public <T> T lookup(Class<T> type, String name) {
        return null;
    }

    @Override

            .flatMap(ext -> ext.serviceToProjectUseMap.entrySet().stream())
            .filter(entry -> entry.getKey().equals(serviceName))
            .map(Map.Entry::getValue)
            .findAny();
    }

    private void addFixtureProject(String path) {
        Project fixtureProject = this.project.findProject(path);
        if (fixtureProject == null) {

    }

    @Override
    public Optional<Lifecycle> lookup(String id) {
        return stream().filter(lf -> Objects.equals(id, lf.id())).findAny();
    }

    @Override
    public List<String> computePhases(Lifecycle lifecycle) {
        Graph graph = new Graph();
        addPhases(graph, null, null, lifecycle.v3phases());

   * iterable is empty, {@code Optional.absent()} is returned.
   *
   * <p><b>{@code Stream} equivalent:</b> if the goal is to obtain any element, {@link
   * Stream#findAny}; if it must specifically be the <i>first</i> element, {@code Stream#findFirst}.
   *
   * @throws NullPointerException if the first element is null; if this is a possibility, use {@code

   * iterable is empty, {@code Optional.absent()} is returned.
   *
   * <p><b>{@code Stream} equivalent:</b> if the goal is to obtain any element, {@link
   * Stream#findAny}; if it must specifically be the <i>first</i> element, {@code Stream#findFirst}.
   *
   * @throws NullPointerException if the first element is null; if this is a possibility, use {@code

   * href="http://gee.cs.oswego.edu/dl/html/StreamParallelGuidance.html">efficiently splittable</a>
   * streams.
   *
   * <p>If the stream has nondeterministic order, this has equivalent semantics to {@link
   * Stream#findAny} (which you might as well use).
   *
   * @see Stream#findFirst()
   * @throws NullPointerException if the last element of the stream is null
   */
  /*

   * href="http://gee.cs.oswego.edu/dl/html/StreamParallelGuidance.html">efficiently splittable</a>
   * streams.
   *
   * <p>If the stream has nondeterministic order, this has equivalent semantics to {@link
   * Stream#findAny} (which you might as well use).
   *
   * @see Stream#findFirst()
   * @throws NullPointerException if the last element of the stream is null
   */
  /*

        } else {
            return "";
        }
    }

    private String checkAtLeastOneExists(String message, Stream<? extends Class<?>> stream) {
        if (stream.findAny().isPresent()) {
            return "";
        } else {
            return "Expected at least one " + message + ", but found none.";
        }
    }

    private boolean seemsLikeATest(Class<?> clazz) {

   * iterator whether it has any elements <i>remaining</i> (which one does using {@link
   * Iterator#hasNext}).
   *
   * <p><b>{@code Stream} equivalent:</b> {@code !stream.findAny().isPresent()}
   *
   * @return {@code true} if the iterable contains no elements
   */
  public static boolean isEmpty(Iterable<?> iterable) {
    if (iterable instanceof Collection) {