if (!equals(i1.next(), i2.next())) {
                    return false;
                }
            }
            return !i1.hasNext() && !i2.hasNext();
        }
        return false;
    }

    private boolean equals(Exclusion e1, Exclusion e2) {
        return Objects.equals(e1.getGroupId(), e2.getGroupId())

public @interface Mojo {
    /**
     * goal name (required).
     * @return the goal name
     */
    @Nonnull
    String name();

    /**
     * default phase to bind your mojo.
     * @return the default phase
     */
    @Nonnull
    String defaultPhase() default "";

    /**
     * does your mojo requires a project to be executed?
     * @return requires a project
     */
    boolean projectRequired() default true;

    @Inject
    protected RepositorySystem repositorySystem;

    @Inject
    protected PlexusContainer container;

    public PlexusContainer getContainer() {
        return container;
    }

    @BeforeEach
    public void setUp() throws Exception {
        if (getContainer().hasComponent(ProjectBuilder.class, "test")) {

        String originalPackaging = project.getOriginalModel().getPackaging();
        if (POM_PACKAGING.equals(packaging) && !BOM_PACKAGING.equals(originalPackaging)) {
            return buildPom(session, project, src);
        } else {
            return buildNonPom(session, project, src);
        }
    }

    protected Model buildPom(RepositorySystemSession session, MavenProject project, Path src)

    }

    /**
     * Gets the group id of the unresolvable model.
     *
     * @return The group id of the unresolvable model, can be empty but never {@code null}.
     */
    public String getGroupId() {
        return groupId;
    }

    /**
     * Gets the artifact id of the unresolvable model.
     *
     * @return The artifact id of the unresolvable model, can be empty but never {@code null}.
     */

    static <T> T nonNull(T t) {
        if (t == null) {
            throw new IllegalArgumentException();
        }
        return t;
    }

    static <T> T nonNull(T t, String name) {
        if (t == null) {
            throw new IllegalArgumentException(name + " cannot be null");
        }
        return t;
    }

    static <T> T cast(Class<T> clazz, Object o, String name) {
        if (!clazz.isInstance(o)) {

                    break;
                }
            }
        }
        return visitor.leave(this);
    }

    @Override
    public Node filter(Predicate<Node> filter) {
        List<Node> children =
                getChildren().stream().filter(filter).map(n -> n.filter(filter)).collect(Collectors.toList());
        return new WrapperNode(this, Collections.unmodifiableList(children));
    }

    @Override

    @Override
    public String getId() {
        return "Maven3";
    }

    @Override
    public boolean isStrictDependencyScopes() {
        return false;
    }

    @Override
    public boolean isStrictResolutionScopes() {
        return false;
    }

    @Override
    public BuildScopeSource getBuildScopeSource() {
        return new BuildScopeMatrixSource(

            }
        }
    }

    @Override
    public Collection<? extends Metadata> prepare(Collection<? extends Artifact> artifacts) {
        return Collections.emptyList();
    }

    @Override
    public Artifact transformArtifact(Artifact artifact) {
        return artifact;
    }

    @Override
    public Collection<? extends Metadata> finish(Collection<? extends Artifact> artifacts) {

                    // TODO: add a plugin mechanism for allowing plugin to specify their selection algorithm.
                    return Optional.empty();
                }
            }
        }
        if (classes & modules) {
            selected = getPathType(path);
        }
        return Optional.ofNullable(selected);
    }