dart 2.9

packages/connectivity/connectivity_macos/example/test_driver/test/integration_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
 import 'dart:convert';
 import 'dart:io';
 import 'package:flutter_driver/flutter_driver.dart';