anchor.diff:    test('groupTypesByParentNamespace', () {
       expect(
           groupTypesByParentNamespace([
  -          'Windows.Data.Xml.Dom.IXmlNodeList',
             'Windows.Foundation.IAsyncInfo',
             'Windows.Foundation.IClosable',
             'Windows.Foundation.IPropertyValue',
  
positive.code:           'Windows.Networking.IHostName',
            'Windows.Storage.IStorageItem',
            'Windows.Storage.UserDataPaths',
            'Windows.Storage.Pickers.IFileOpenPicker',
            'Windows.UI.Notifications.IToastNotificationManagerStatics',
            'Windows.UI.Notifications.ToastNotification',
          ]),
          equals([
            NamespaceGroup(
              namespace: 'Windows.Data.Xml.Dom',
              types: ['Windows.Data.Xml.Dom.IXmlNodeList'],
            ),
            NamespaceGroup(
              namespace: 'Windows.Foundation',
              types: [
  
negative.code:           ),
            NamespaceGroup(
              namespace: 'Windows.Storage.Pickers',
              types: ['Windows.Storage.Pickers.FileOpenPicker'],
            ),
            NamespaceGroup(
              namespace: 'Windows.UI.Notifications',
  