/**
 * Defines a hierarchical visitor for collecting dependency node trees.
 *
 * @since 4.0.0
 */
@Experimental
@Consumer
public interface NodeVisitor {
    /**
     * Starts the visit to the specified dependency node.
     *
     * @param node the dependency node to visit
     * @return <code>true</code> to visit the specified dependency node's children, <code>false</code> to skip the

    }

    @Override
    public void visit(TokenVisitor visitor) {
        while (!scanner.isEmpty()) {
            if (scanner.lookingAt(START_HTML_COMMENT)) {
                skipComment();
                continue;
            }
            if (scanner.lookingAt(HTML_ELEMENT)) {
                parseStartElement(visitor);
                continue;
            }

        return queryBuilder.rewrite(queryShardContext);
    }

    @Override
    public void visit(final QueryBuilderVisitor visitor) {
        queryBuilder.visit(visitor);
    }

    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {

        return null
    }

    private static List<Boolean> typeParametersNullabilityOf(CtClass ctClass) {
        NullableClassTypeParametersVisitor visitor = new NullableClassTypeParametersVisitor()
        new ClassReader(byteCodeFrom(ctClass)).accept(visitor, 0)
        return visitor.typeParametersNullability
    }

    static class NullableClassTypeParametersVisitor extends ClassVisitor {

                    visit(contributor);
                }
                for (MailingList mailingList : model.getMailingLists()) {
                    visit(mailingList);
                }
                visit(model.getPrerequisites());
                visit(model.getScm());
                visit(model.getIssueManagement());
                visit(model.getCiManagement());
                visit(model.getBuild());

   *
   * Visited Nodes = {}
   * EndpointPair [N1, N2] - return
   * EndpointPair [N1, N3] - return
   * Visited Nodes = {N1}
   * EndpointPair [N2, N1] - skip
   * EndpointPair [N2, N3] - return
   * Visited Nodes = {N1, N2}
   * EndpointPair [N3, N1] - skip
   * EndpointPair [N3, N2] - skip
   * Visited Nodes = {N1, N2, N3}
   * EndpointPair [N4, N4] - return
   * Visited Nodes = {N1, N2, N3, N4}

    object : SinceVisitor() {

        override fun visit(declaration: ClassOrInterfaceDeclaration, arg: Unit?): SinceTagStatus? =
            declaration.getSinceIfMatchesName(classSimpleName) ?: super.visit(declaration, arg)

        override fun visit(declaration: AnnotationDeclaration, arg: Unit?): SinceTagStatus? =
            declaration.getSinceIfMatchesName(classSimpleName) ?: super.visit(declaration, arg)

		f.walk(n.Body, ctxTypeSwitch, visit)
	case *ast.CommClause:
		f.walk(n.Comm, ctxStmt, visit)
		f.walk(n.Body, ctxStmt, visit)
	case *ast.SelectStmt:
		f.walk(n.Body, ctxStmt, visit)
	case *ast.ForStmt:
		f.walk(n.Init, ctxStmt, visit)
		f.walk(&n.Cond, ctxExpr, visit)
		f.walk(n.Post, ctxStmt, visit)
		f.walk(n.Body, ctxStmt, visit)
	case *ast.RangeStmt:
		f.walk(&n.Key, ctxExpr, visit)

    fun visitTree(
        classDetails: ClassDetails,
        classesDir: File,
        jarOutputStream: JarOutputStream,
        visited: MutableSet<ClassDetails>
    ) {

        if (!visited.add(classDetails)) {
            return
        }
        if (classDetails.visited) {
            val fileName = classDetails.outputClassFilename
            val classFile = classesDir.resolve(fileName)

        return isSuccessorOf(new HashSet<>(), step);
    }

    private boolean isSuccessorOf(Set<BuildStep> visited, BuildStep step) {
        if (this == step) {
            return true;
        } else if (visited.add(this)) {
            return this.predecessors.stream().anyMatch(n -> n.isSuccessorOf(visited, step));
        } else {
            return false;
        }
    }

    public void skip() {