snapshot of https://github.com/flutter/samples.git (main, 2026-09-16; blobs > 131072B omitted)

testing_app/lib/models/favorites.dart

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+// Copyright 2020 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+
+/// The [Favorites] class holds a list of favorite items saved by the user.
+class Favorites extends ChangeNotifier {
+  final List<int> _favoriteItems = [];
+
+  List<int> get items => _favoriteItems;
+
+  void add(int itemNo) {
+    _favoriteItems.add(itemNo);
+    notifyListeners();
+  }
+
+  void remove(int itemNo) {
+    _favoriteItems.remove(itemNo);
+    notifyListeners();
+  }
+}