// Copyright 2014 The Flutter Authors. 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';import'package:flutter_api_samples/widgets/sliver/sliver_opacity.1.dart'asexample;import'package:flutter_test/flutter_test.dart';voidmain(){testWidgets('SliverOpacity example',(WidgetTestertester)async{awaittester.pumpWidget(