public VisitorImpl(TokenVisitor visitor) {
            this.visitor = visitor;
        }

        private void unwindTo(String element, TokenVisitor visitor) {
            if (elementStack.contains(element)) {
                while (!elementStack.getFirst().equals(element)) {
                    visitor.onEndHtmlElement(elementStack.removeFirst());
                }
                elementStack.removeFirst();

/**
 * 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

        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 {

    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)

            scanner.find('}');
            String value = scanner.region();
            visitor.onText(value);
        }

        // end of tag marker
        if (scanner.lookingAt('}')) {
            visitor.onEndJavadocTag(tagName);
            scanner.next();
        }
    }

    private void parseStartElement(TokenVisitor visitor) {
        // start element marker
        scanner.next();

    /**
     * Traverses this node and potentially its children using the specified visitor.
     *
     * @param visitor the visitor to call back, must not be {@code null}
     * @return {@code true} to visit siblings nodes of this node as well, {@code false} to skip siblings
     */
    boolean accept(@Nonnull NodeVisitor visitor);

    /**
     * Returns a new tree starting at this node, filtering the children.

        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 {

        visit(type.getLowerBounds());
        visit(type.getUpperBounds());
      }

      @Override
      void visitParameterizedType(ParameterizedType type) {
        visit(type.getActualTypeArguments());
        visit(type.getOwnerType());
      }

      @Override
      void visitGenericArrayType(GenericArrayType type) {
        visit(type.getGenericComponentType());
      }

  <suppress files="modules[/\\]lang-painless[/\\]src[/\\]main[/\\]java[/\\]org[/\\]elasticsearch[/\\]painless[/\\]antlr[/\\]SuggestLexer\.java" checks="." />
  <suppress files="plugin[/\\]sql[/\\]src[/\\]main[/\\]java[/\\]org[/\\]elasticsearch[/\\]xpack[/\\]sql[/\\]parser[/\\]SqlBase(Base(Listener|Visitor)|Lexer|Listener|Parser|Visitor).java" checks="." />

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