```dart
import 'package:flutter/widgets.dart';

class FlutterTodosKeys {
  static final extraActionsPopupMenuButton =
      const Key('__extraActionsPopupMenuButton__');
  static final extraActionsEmptyContainer =
      const Key('__extraActionsEmptyContainer__');
  static final filteredTodosEmptyContainer =
      const Key('__filteredTodosEmptyContainer__');
  static final statsLoadInProgressIndicator = const Key('__statsLoadInProgressIndicator__');
  static final emptyStatsContainer = const Key('__emptyStatsContainer__');
  static final emptyDetailsContainer = const Key('__emptyDetailsContainer__');
  static final detailsScreenCheckBox = const Key('__detailsScreenCheckBox__');
}
```
