anchor.diff:  
       group('does not warn when multiple children are passed as variadic args', () {
         test('when rendering DOM components', () {
  -        render(
  +        renderWithUniqueOwnerName(() =>
               react.div({},
                 react.span({}),
                 react.span({}),
  
positive.code: import 'package:react/react_client.dart';
  import 'package:react/react_test_utils.dart' as react_test_utils;
  
  void main() {
    useHtmlConfiguration();
    setClientConfiguration();
  
    void render(ReactElement reactElement) {
      react_test_utils.renderIntoDocument(reactElement);
    }
  
    group('Key/children validation', () {
      bool consoleErrorCalled;
  
negative.code: 
      group('warns when multiple children are passed as a list', () {
        test('when rendering DOM components', () {
          renderWithUniqueOwnerName(() =>
              react.div({}, [
                react.span({}),
                react.span({}),
  