How to use the typedoc.ReflectionKind.ExternalModule function in typedoc

function findConstructs(node: Node, files: string[], parent?: Reflection) {
      if (parent) {
        node.parent = parent;
      }
      // Global = 0, ExternalModule = 1
      if (
        node.kind === ReflectionKind.Global ||
        node.kind === ReflectionKind.ExternalModule
      ) {
        let children = node.children;
        if (children && children.length > 0) {
          children.forEach(function(child) {
            findConstructs(child, files, node);
          });
        }
      } else {
        if (
          (node.kind === ReflectionKind.Class ||
            node.kind === ReflectionKind.Interface ||
            node.kind === ReflectionKind.TypeAlias ||
            node.kind === ReflectionKind.ObjectLiteral ||
            node.kind === ReflectionKind.Module ||
            node.kind === ReflectionKind.Variable ||
            node.kind === ReflectionKind.Enum ||

function getQualifiedName(node: Node) {
  const names: string[] = [];
  let current: Reflection | undefined = node;
  while (current) {
    if (
      current.kind === ReflectionKind.Global ||
      current.kind === ReflectionKind.ExternalModule
    ) {
      // Skip global/external module nodes
      break;
    }
    const index = current.name.lastIndexOf('.');
    const name =
      index === -1 ? current.name : current.name.substring(index + 1);

    // Check static methods/properties
    if (
      current.kind === ReflectionKind.Method ||
      current.kind === ReflectionKind.Property
    ) {
      if (current.flags.isStatic) {
        names.unshift(name);
      } else {

function findConstructs(node: Node, files: string[], parent?: Reflection) {
      if (parent) {
        node.parent = parent;
      }
      // Global = 0, ExternalModule = 1
      if (
        node.kind === ReflectionKind.Global ||
        node.kind === ReflectionKind.ExternalModule
      ) {
        let children = node.children;
        if (children && children.length > 0) {
          children.forEach(function(child) {
            findConstructs(child, files, node);
          });
        }
      } else {
        if (
          (node.kind === ReflectionKind.Class ||
            node.kind === ReflectionKind.Interface ||
            node.kind === ReflectionKind.TypeAlias ||
            node.kind === ReflectionKind.ObjectLiteral ||
            node.kind === ReflectionKind.Module ||
            node.kind === ReflectionKind.Variable ||
            node.kind === ReflectionKind.Enum ||

function getNavigationGroup(reflection: DeclarationReflection) {
      if (reflection.kind === ReflectionKind.ExternalModule) {
        return externalModulesNavigation;
      }
      if (reflection.kind === ReflectionKind.Module) {
        return modulesNavigation;
      }
      if (reflection.kind === ReflectionKind.Class) {
        return classesNavigation;
      }
      if (reflection.kind === ReflectionKind.Enum) {
        return enumsNavigation;
      }
      if (reflection.kind === ReflectionKind.Interface) {
        return interfacesNavigation;
      }
      return null;
    }

private externalModulesWithoutTestsAndMocks(projectReflection: ProjectReflection): DeclarationReflection[] {
    return projectReflection.getChildrenByKind(ReflectionKind.ExternalModule)
      .filter((m) => !m.name.endsWith('.mock"') && !m.name.endsWith('.test"'));
  }