/**
     * Called prior to scheduling resolution of a set of artifacts. Should be called in result order.
     */
    default FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source) {
        return FileCollectionStructureVisitor.VisitType.Visit;
    }

    /**
     * Visits an artifact file.
     *

        def artifactVisitor = Mock(ArtifactVisitor)

        when:
        set.visit(listener)

        then:
        1 * listener.prepareForVisit(_) >> FileCollectionStructureVisitor.VisitType.NoContents
        1 * listener.visitArtifacts(_) >> { ResolvedArtifactSet.Artifacts artifacts -> artifacts.visit(artifactVisitor) }
        1 * artifactVisitor.endVisitCollection(_)
        0 * _
    }

        this.visitor = visitor;
    }

    public Set<Throwable> getFailures() {
        return failures;
    }

    @Override
    public FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source) {
        return visitor.prepareForVisit(source);
    }

    @Override
    public void visitFile(File file) {
        files.add(file);
    }

    public ArtifactVisitorToResolvedFileVisitorAdapter(ResolvedFileVisitor visitor) {
        this.visitor = visitor;
    }

    @Override
    public FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source) {
        return visitor.prepareForVisit(source);
    }

    public void visitFile(File file) {
        visitor.visitFile(file);
    }

    @Override

            StartVisitAction(ArtifactVisitor visitor) {
                this.visitor = visitor;
            }

            @Override
            public FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source) {
                return visitor.prepareForVisit(source);
            }

            @Override

     */
    interface Visitor {
        /**
         * Called prior to scheduling resolution of a set of the given type. Should be called in result order.
         */
        FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source);

        /**
         * Visits zero or more artifacts.
         */
        void visitArtifacts(Artifacts artifacts);
    }

        walkTypeHierarchy(clazz, IGNORED_OBJECT_TYPES, new TypeVisitor<T>() {
            @Override
            public TypeVisitResult visitType(Class<? super T> type) {
                Method[] declaredMethods = type.getDeclaredMethods();
                // Sort of determinism
                Arrays.sort(declaredMethods, Ordering.usingToString());