dart 2.9

packages/in_app_purchase/integration_test/in_app_purchase_test.dart

@@ -1,8 +1,8 @@
 // Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart = 2.10
 
+// @dart = 2.9
 import 'package:flutter_test/flutter_test.dart';
 import 'package:in_app_purchase/in_app_purchase.dart';
 import 'package:integration_test/integration_test.dart';