diff --git a/dev/benchmarks/macrobenchmarks/lib/src/cull_opacity.dart b/dev/benchmarks/macrobenchmarks/lib/src/cull_opacity.dart
index 6ee3f57a9a..5f4e87a51f 100644
--- a/dev/benchmarks/macrobenchmarks/lib/src/cull_opacity.dart
+++ b/dev/benchmarks/macrobenchmarks/lib/src/cull_opacity.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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';
 
 class CullOpacityPage extends StatefulWidget {
diff --git a/dev/devicelab/bin/tasks/build_aar_module_test.dart b/dev/devicelab/bin/tasks/build_aar_module_test.dart
index 1e9300c73f..28d4450c7b 100644
--- a/dev/devicelab/bin/tasks/build_aar_module_test.dart
+++ b/dev/devicelab/bin/tasks/build_aar_module_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/build_aar_plugin_test.dart b/dev/devicelab/bin/tasks/build_aar_plugin_test.dart
index 1dedf8a4d9..8e41b222c0 100644
--- a/dev/devicelab/bin/tasks/build_aar_plugin_test.dart
+++ b/dev/devicelab/bin/tasks/build_aar_plugin_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/build_mode_test.dart b/dev/devicelab/bin/tasks/build_mode_test.dart
index b6a0dfce89..8767359d95 100644
--- a/dev/devicelab/bin/tasks/build_mode_test.dart
+++ b/dev/devicelab/bin/tasks/build_mode_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/commands_test.dart b/dev/devicelab/bin/tasks/commands_test.dart
index 1441384333..730df3c5da 100644
--- a/dev/devicelab/bin/tasks/commands_test.dart
+++ b/dev/devicelab/bin/tasks/commands_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/complex_layout_semantics_perf.dart b/dev/devicelab/bin/tasks/complex_layout_semantics_perf.dart
index cca05ea8ac..5f99161128 100644
--- a/dev/devicelab/bin/tasks/complex_layout_semantics_perf.dart
+++ b/dev/devicelab/bin/tasks/complex_layout_semantics_perf.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/flutter_attach_test.dart b/dev/devicelab/bin/tasks/flutter_attach_test.dart
index 3cf04035a3..ccd292847b 100644
--- a/dev/devicelab/bin/tasks/flutter_attach_test.dart
+++ b/dev/devicelab/bin/tasks/flutter_attach_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/flutter_create_offline_test_linux.dart b/dev/devicelab/bin/tasks/flutter_create_offline_test_linux.dart
index f449b5165f..f8e7bf65eb 100644
--- a/dev/devicelab/bin/tasks/flutter_create_offline_test_linux.dart
+++ b/dev/devicelab/bin/tasks/flutter_create_offline_test_linux.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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_devicelab/framework/framework.dart';
 import 'package:flutter_devicelab/tasks/integration_tests.dart';
 
diff --git a/dev/devicelab/bin/tasks/flutter_create_offline_test_mac.dart b/dev/devicelab/bin/tasks/flutter_create_offline_test_mac.dart
index f449b5165f..f8e7bf65eb 100644
--- a/dev/devicelab/bin/tasks/flutter_create_offline_test_mac.dart
+++ b/dev/devicelab/bin/tasks/flutter_create_offline_test_mac.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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_devicelab/framework/framework.dart';
 import 'package:flutter_devicelab/tasks/integration_tests.dart';
 
diff --git a/dev/devicelab/bin/tasks/flutter_create_offline_test_windows.dart b/dev/devicelab/bin/tasks/flutter_create_offline_test_windows.dart
index f449b5165f..f8e7bf65eb 100644
--- a/dev/devicelab/bin/tasks/flutter_create_offline_test_windows.dart
+++ b/dev/devicelab/bin/tasks/flutter_create_offline_test_windows.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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_devicelab/framework/framework.dart';
 import 'package:flutter_devicelab/tasks/integration_tests.dart';
 
diff --git a/dev/devicelab/bin/tasks/flutter_test_performance.dart b/dev/devicelab/bin/tasks/flutter_test_performance.dart
index 86c4fd3f5f..8eb3040f09 100644
--- a/dev/devicelab/bin/tasks/flutter_test_performance.dart
+++ b/dev/devicelab/bin/tasks/flutter_test_performance.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_jetifier_test.dart b/dev/devicelab/bin/tasks/gradle_jetifier_test.dart
index 28048b5b8e..9eb953a64e 100644
--- a/dev/devicelab/bin/tasks/gradle_jetifier_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_jetifier_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_migrate_settings_test.dart b/dev/devicelab/bin/tasks/gradle_migrate_settings_test.dart
index 49873c13ae..2582ecaa92 100644
--- a/dev/devicelab/bin/tasks/gradle_migrate_settings_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_migrate_settings_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_non_android_plugin_test.dart b/dev/devicelab/bin/tasks/gradle_non_android_plugin_test.dart
index 5cf66c42f3..a76a78bc27 100644
--- a/dev/devicelab/bin/tasks/gradle_non_android_plugin_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_non_android_plugin_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_plugin_bundle_test.dart b/dev/devicelab/bin/tasks/gradle_plugin_bundle_test.dart
index 44bc493316..02ea2b9ffc 100644
--- a/dev/devicelab/bin/tasks/gradle_plugin_bundle_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_plugin_bundle_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_plugin_dependencies_test.dart b/dev/devicelab/bin/tasks/gradle_plugin_dependencies_test.dart
index 6df1afdd5f..d9e7f1b668 100644
--- a/dev/devicelab/bin/tasks/gradle_plugin_dependencies_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_plugin_dependencies_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_plugin_fat_apk_test.dart b/dev/devicelab/bin/tasks/gradle_plugin_fat_apk_test.dart
index d72e0b6229..888a7ba4fe 100644
--- a/dev/devicelab/bin/tasks/gradle_plugin_fat_apk_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_plugin_fat_apk_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_plugin_light_apk_test.dart b/dev/devicelab/bin/tasks/gradle_plugin_light_apk_test.dart
index 1e99ebba1a..5ce38cfce4 100644
--- a/dev/devicelab/bin/tasks/gradle_plugin_light_apk_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_plugin_light_apk_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_plugins_without_annotations_test.dart b/dev/devicelab/bin/tasks/gradle_plugins_without_annotations_test.dart
index efa7eb21b3..638a143477 100644
--- a/dev/devicelab/bin/tasks/gradle_plugins_without_annotations_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_plugins_without_annotations_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/gradle_r8_test.dart b/dev/devicelab/bin/tasks/gradle_r8_test.dart
index 49017e71d5..bbd8c6afde 100644
--- a/dev/devicelab/bin/tasks/gradle_r8_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_r8_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/hot_mode_dev_cycle__benchmark.dart b/dev/devicelab/bin/tasks/hot_mode_dev_cycle__benchmark.dart
index 0660c26bb0..ece3e04e95 100644
--- a/dev/devicelab/bin/tasks/hot_mode_dev_cycle__benchmark.dart
+++ b/dev/devicelab/bin/tasks/hot_mode_dev_cycle__benchmark.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/hot_mode_dev_cycle_linux__benchmark.dart b/dev/devicelab/bin/tasks/hot_mode_dev_cycle_linux__benchmark.dart
index 24af612629..e4ef9c2905 100644
--- a/dev/devicelab/bin/tasks/hot_mode_dev_cycle_linux__benchmark.dart
+++ b/dev/devicelab/bin/tasks/hot_mode_dev_cycle_linux__benchmark.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/hot_mode_dev_cycle_win__benchmark.dart b/dev/devicelab/bin/tasks/hot_mode_dev_cycle_win__benchmark.dart
index 24af612629..e4ef9c2905 100644
--- a/dev/devicelab/bin/tasks/hot_mode_dev_cycle_win__benchmark.dart
+++ b/dev/devicelab/bin/tasks/hot_mode_dev_cycle_win__benchmark.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/module_host_with_custom_build_test.dart b/dev/devicelab/bin/tasks/module_host_with_custom_build_test.dart
index e84df29f43..20324aab64 100644
--- a/dev/devicelab/bin/tasks/module_host_with_custom_build_test.dart
+++ b/dev/devicelab/bin/tasks/module_host_with_custom_build_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/module_test.dart b/dev/devicelab/bin/tasks/module_test.dart
index c4f62fb14b..7a4ba6dec3 100644
--- a/dev/devicelab/bin/tasks/module_test.dart
+++ b/dev/devicelab/bin/tasks/module_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/module_test_ios.dart b/dev/devicelab/bin/tasks/module_test_ios.dart
index 5ffd3e08da..ab8ab28f40 100644
--- a/dev/devicelab/bin/tasks/module_test_ios.dart
+++ b/dev/devicelab/bin/tasks/module_test_ios.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/named_isolates_test.dart b/dev/devicelab/bin/tasks/named_isolates_test.dart
index d293210a53..9c79f816e9 100644
--- a/dev/devicelab/bin/tasks/named_isolates_test.dart
+++ b/dev/devicelab/bin/tasks/named_isolates_test.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:async';
 import 'dart:convert';
 import 'dart:io';
diff --git a/dev/devicelab/bin/tasks/plugin_test.dart b/dev/devicelab/bin/tasks/plugin_test.dart
index 1d9359a418..a6d702fa20 100644
--- a/dev/devicelab/bin/tasks/plugin_test.dart
+++ b/dev/devicelab/bin/tasks/plugin_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/plugin_test_ios.dart b/dev/devicelab/bin/tasks/plugin_test_ios.dart
index 961f57f7f3..365a946bee 100644
--- a/dev/devicelab/bin/tasks/plugin_test_ios.dart
+++ b/dev/devicelab/bin/tasks/plugin_test_ios.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/plugin_test_win.dart b/dev/devicelab/bin/tasks/plugin_test_win.dart
index e00d258687..dc1846a523 100644
--- a/dev/devicelab/bin/tasks/plugin_test_win.dart
+++ b/dev/devicelab/bin/tasks/plugin_test_win.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/routing_test.dart b/dev/devicelab/bin/tasks/routing_test.dart
index aa7ca5f2f5..b6b943b267 100644
--- a/dev/devicelab/bin/tasks/routing_test.dart
+++ b/dev/devicelab/bin/tasks/routing_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/run_machine_concurrent_hot_reload.dart b/dev/devicelab/bin/tasks/run_machine_concurrent_hot_reload.dart
index 1b683cb660..7c400fbaca 100644
--- a/dev/devicelab/bin/tasks/run_machine_concurrent_hot_reload.dart
+++ b/dev/devicelab/bin/tasks/run_machine_concurrent_hot_reload.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/run_release_test.dart b/dev/devicelab/bin/tasks/run_release_test.dart
index 0ee43db07a..b5ac90036e 100644
--- a/dev/devicelab/bin/tasks/run_release_test.dart
+++ b/dev/devicelab/bin/tasks/run_release_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/run_without_leak_linux.dart b/dev/devicelab/bin/tasks/run_without_leak_linux.dart
index 614ea70229..8df4004918 100644
--- a/dev/devicelab/bin/tasks/run_without_leak_linux.dart
+++ b/dev/devicelab/bin/tasks/run_without_leak_linux.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Flutter Authors. All rights reserved.
+// Copyright 2019 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.
 
diff --git a/dev/devicelab/bin/tasks/run_without_leak_mac.dart b/dev/devicelab/bin/tasks/run_without_leak_mac.dart
index 614ea70229..8df4004918 100644
--- a/dev/devicelab/bin/tasks/run_without_leak_mac.dart
+++ b/dev/devicelab/bin/tasks/run_without_leak_mac.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Flutter Authors. All rights reserved.
+// Copyright 2019 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.
 
diff --git a/dev/devicelab/bin/tasks/run_without_leak_win.dart b/dev/devicelab/bin/tasks/run_without_leak_win.dart
index 614ea70229..8df4004918 100644
--- a/dev/devicelab/bin/tasks/run_without_leak_win.dart
+++ b/dev/devicelab/bin/tasks/run_without_leak_win.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Flutter Authors. All rights reserved.
+// Copyright 2019 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.
 
diff --git a/dev/devicelab/bin/tasks/service_extensions_test.dart b/dev/devicelab/bin/tasks/service_extensions_test.dart
index b874ad61da..9581d476f6 100644
--- a/dev/devicelab/bin/tasks/service_extensions_test.dart
+++ b/dev/devicelab/bin/tasks/service_extensions_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle__benchmark.dart b/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle__benchmark.dart
index 37b3255ff8..2ef8d83087 100644
--- a/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle__benchmark.dart
+++ b/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle__benchmark.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle_ios__benchmark.dart b/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle_ios__benchmark.dart
index eddaf1814d..26973f73f9 100644
--- a/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle_ios__benchmark.dart
+++ b/dev/devicelab/bin/tasks/smoke_catalina_hot_mode_dev_cycle_ios__benchmark.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Chromium Authors. All rights reserved.
+// Copyright 2019 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/framework/apk_utils.dart b/dev/devicelab/lib/framework/apk_utils.dart
index 8a99dd37f3..51ccbf575b 100644
--- a/dev/devicelab/lib/framework/apk_utils.dart
+++ b/dev/devicelab/lib/framework/apk_utils.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/framework/ios.dart b/dev/devicelab/lib/framework/ios.dart
index 075c920a74..642a6251c9 100644
--- a/dev/devicelab/lib/framework/ios.dart
+++ b/dev/devicelab/lib/framework/ios.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/framework/utils.dart b/dev/devicelab/lib/framework/utils.dart
index 4c8f6a1831..f132c0d63f 100644
--- a/dev/devicelab/lib/framework/utils.dart
+++ b/dev/devicelab/lib/framework/utils.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/tasks/analysis.dart b/dev/devicelab/lib/tasks/analysis.dart
index eb3c24043e..ed71fe6df7 100644
--- a/dev/devicelab/lib/tasks/analysis.dart
+++ b/dev/devicelab/lib/tasks/analysis.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/tasks/integration_tests.dart b/dev/devicelab/lib/tasks/integration_tests.dart
index f53f5cf13d..4a2b13c01c 100644
--- a/dev/devicelab/lib/tasks/integration_tests.dart
+++ b/dev/devicelab/lib/tasks/integration_tests.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/tasks/perf_tests.dart b/dev/devicelab/lib/tasks/perf_tests.dart
index 9aa2bf5626..dfdae56977 100644
--- a/dev/devicelab/lib/tasks/perf_tests.dart
+++ b/dev/devicelab/lib/tasks/perf_tests.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/lib/tasks/plugin_tests.dart b/dev/devicelab/lib/tasks/plugin_tests.dart
index e574fb6377..6d142f8887 100644
--- a/dev/devicelab/lib/tasks/plugin_tests.dart
+++ b/dev/devicelab/lib/tasks/plugin_tests.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/devicelab/test/utils_test.dart b/dev/devicelab/test/utils_test.dart
index c1932b1521..1c8358e191 100644
--- a/dev/devicelab/test/utils_test.dart
+++ b/dev/devicelab/test/utils_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/dev/docs/platform_integration/lib/android.dart b/dev/docs/platform_integration/lib/android.dart
index c9c119f718..1cd7c48548 100644
--- a/dev/docs/platform_integration/lib/android.dart
+++ b/dev/docs/platform_integration/lib/android.dart
@@ -1,2 +1,6 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 /// [Flutter platform integration APIs for Android.](https://docs.flutter.io/javadoc/)
 library Android;
diff --git a/dev/docs/platform_integration/lib/ios.dart b/dev/docs/platform_integration/lib/ios.dart
index 86c2012df2..c8976f616a 100644
--- a/dev/docs/platform_integration/lib/ios.dart
+++ b/dev/docs/platform_integration/lib/ios.dart
@@ -1,2 +1,6 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 /// [Flutter platform integration APIs for iOS.](https://docs.flutter.io/objcdoc/)
 library iOS;
diff --git a/dev/integration_tests/abstract_method_smoke_test/lib/main.dart b/dev/integration_tests/abstract_method_smoke_test/lib/main.dart
index 1028e44216..2b534667ff 100644
--- a/dev/integration_tests/abstract_method_smoke_test/lib/main.dart
+++ b/dev/integration_tests/abstract_method_smoke_test/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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/services.dart';
 
@@ -59,4 +63,4 @@ class SecondPage extends StatelessWidget {
       ),
     );
   }
-}
\ No newline at end of file
+}
diff --git a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/test/widget_test.dart b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/test/widget_test.dart
index 7b135251ee..c6ff61f8d5 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/test/widget_test.dart
+++ b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/test/widget_test.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 // This is a basic Flutter widget test.
 //
 // To perform an interaction with a widget in your test, use the WidgetTester
diff --git a/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/lib/main.dart b/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/lib/main.dart
index 7342a11e85..0eef3aa3dd 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/lib/main.dart
+++ b/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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';
 
 void main() => runApp(MyApp());
diff --git a/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/test/widget_test.dart b/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/test/widget_test.dart
index d0efff84b5..c4fd6725c7 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/test/widget_test.dart
+++ b/dev/integration_tests/android_splash_screens/splash_screen_load_rotate/test/widget_test.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 // This is a basic Flutter widget test.
 //
 // To perform an interaction with a widget in your test, use the WidgetTester
diff --git a/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/lib/main.dart b/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/lib/main.dart
index 7342a11e85..0eef3aa3dd 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/lib/main.dart
+++ b/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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';
 
 void main() => runApp(MyApp());
diff --git a/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test/widget_test.dart b/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test/widget_test.dart
index 79b3ab3858..51989354dd 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test/widget_test.dart
+++ b/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test/widget_test.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 // This is a basic Flutter widget test.
 //
 // To perform an interaction with a widget in your test, use the WidgetTester
diff --git a/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test_driver/main.dart b/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test_driver/main.dart
index cc92f2bf5f..a3e3b9afd8 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test_driver/main.dart
+++ b/dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/test_driver/main.dart
@@ -1,7 +1,11 @@
+// Copyright 2014 The Chromium 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_driver/driver_extension.dart';
 import 'package:splash_screen_trans_rotate/main.dart' as app;
 
 void main() {
   enableFlutterDriverExtension();
   app.main();
-}
\ No newline at end of file
+}
diff --git a/dev/integration_tests/android_views/lib/main.dart b/dev/integration_tests/android_views/lib/main.dart
index 9697a6a549..ab346a09aa 100644
--- a/dev/integration_tests/android_views/lib/main.dart
+++ b/dev/integration_tests/android_views/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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_driver/driver_extension.dart';
 import 'motion_events_page.dart';
diff --git a/dev/integration_tests/codegen/test/example_test.dart b/dev/integration_tests/codegen/test/example_test.dart
index 6d687eb92d..4cbbe33d2d 100644
--- a/dev/integration_tests/codegen/test/example_test.dart
+++ b/dev/integration_tests/codegen/test/example_test.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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:codegen/main.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
diff --git a/dev/integration_tests/flavors/lib/main.dart b/dev/integration_tests/flavors/lib/main.dart
index f0018a3ca9..6be4ba6028 100644
--- a/dev/integration_tests/flavors/lib/main.dart
+++ b/dev/integration_tests/flavors/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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/services.dart';
 import 'package:flutter_driver/driver_extension.dart';
diff --git a/dev/integration_tests/ios_add2app/flutterapp/README.md b/dev/integration_tests/ios_add2app/flutterapp/README.md
deleted file mode 100644
index ae7d53fdc6..0000000000
--- a/dev/integration_tests/ios_add2app/flutterapp/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# ios_add2app_flutter
-
-A new flutter module project.
-
-## Getting Started
-
-For help getting started with Flutter, view our online
-[documentation](https://flutter.dev/).
diff --git a/dev/integration_tests/ios_add2app/flutterapp/lib/main.dart b/dev/integration_tests/ios_add2app/flutterapp/lib/main.dart
index fff451158e..4c9ca3080c 100644
--- a/dev/integration_tests/ios_add2app/flutterapp/lib/main.dart
+++ b/dev/integration_tests/ios_add2app/flutterapp/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:async';
 import 'dart:ui' as ui;
 
diff --git a/dev/integration_tests/ios_add2app/flutterapp/lib/marquee.dart b/dev/integration_tests/ios_add2app/flutterapp/lib/marquee.dart
index 934a04bb46..9f3089f4e1 100644
--- a/dev/integration_tests/ios_add2app/flutterapp/lib/marquee.dart
+++ b/dev/integration_tests/ios_add2app/flutterapp/lib/marquee.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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/animation.dart';
 import 'package:flutter/services.dart';
diff --git a/dev/integration_tests/ios_add2app/flutterapp/test/widget_test.dart b/dev/integration_tests/ios_add2app/flutterapp/test/widget_test.dart
deleted file mode 100644
index 153f055660..0000000000
--- a/dev/integration_tests/ios_add2app/flutterapp/test/widget_test.dart
+++ /dev/null
@@ -1,3 +0,0 @@
-void main() {
-
-}
diff --git a/dev/integration_tests/named_isolates/lib/main.dart b/dev/integration_tests/named_isolates/lib/main.dart
index ec09c9e658..801a1335c2 100644
--- a/dev/integration_tests/named_isolates/lib/main.dart
+++ b/dev/integration_tests/named_isolates/lib/main.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:ui' as ui;
 import 'package:flutter/material.dart';
 
diff --git a/dev/integration_tests/simple_codegen/lib/builders.dart b/dev/integration_tests/simple_codegen/lib/builders.dart
index 0f2199aee1..d3ac8b9c29 100644
--- a/dev/integration_tests/simple_codegen/lib/builders.dart
+++ b/dev/integration_tests/simple_codegen/lib/builders.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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:build/build.dart';
 
 /// The builder factory used by the `build.yaml` script.
diff --git a/dev/manual_tests/test/mock_image_http.dart b/dev/manual_tests/test/mock_image_http.dart
index c0ece4c9ed..c9a3323895 100644
--- a/dev/manual_tests/test/mock_image_http.dart
+++ b/dev/manual_tests/test/mock_image_http.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:async';
 import 'dart:io';
 
diff --git a/dev/tools/localization/gen_cupertino_localizations.dart b/dev/tools/localization/gen_cupertino_localizations.dart
index 9ad7e10026..158ed953a5 100644
--- a/dev/tools/localization/gen_cupertino_localizations.dart
+++ b/dev/tools/localization/gen_cupertino_localizations.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'localizations_utils.dart';
 
 HeaderGenerator generateCupertinoHeader = (String regenerateInstructions) {
diff --git a/dev/tools/localization/gen_material_localizations.dart b/dev/tools/localization/gen_material_localizations.dart
index 1909306b4a..136d122e42 100644
--- a/dev/tools/localization/gen_material_localizations.dart
+++ b/dev/tools/localization/gen_material_localizations.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'localizations_utils.dart';
 
 HeaderGenerator generateMaterialHeader = (String regenerateInstructions) {
diff --git a/examples/flutter_gallery/lib/demo/images_demo.dart b/examples/flutter_gallery/lib/demo/images_demo.dart
index 9863a2bc80..e2d02cd592 100644
--- a/examples/flutter_gallery/lib/demo/images_demo.dart
+++ b/examples/flutter_gallery/lib/demo/images_demo.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 '../gallery/demo.dart';
diff --git a/examples/flutter_gallery/lib/demo/material/elevation_demo.dart b/examples/flutter_gallery/lib/demo/material/elevation_demo.dart
index 0198657bba..ec44b389e1 100644
--- a/examples/flutter_gallery/lib/demo/material/elevation_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/elevation_demo.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 '../../gallery/demo.dart';
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart
index 4a5bf99339..8c5a5d8c08 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:ui' show Vertices;
 import 'package:flutter/material.dart';
 import 'transformations_demo_board.dart';
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_board.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_board.dart
index bf74076d4f..8d830e527a 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_board.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_board.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:collection' show IterableMixin;
 import 'dart:math';
 import 'dart:ui' show Vertices;
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_color_picker.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_color_picker.dart
index ebcaa0d3d0..80e612d87e 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_color_picker.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_color_picker.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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';
 
 // A generic widget for a list of selectable colors.
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_edit_board_point.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_edit_board_point.dart
index 160054b050..b9803d8652 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_edit_board_point.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_edit_board_point.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'transformations_demo_board.dart';
 import 'transformations_demo_color_picker.dart';
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_gesture_transformable.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_gesture_transformable.dart
index c8bd21d1bc..54f55e1372 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_gesture_transformable.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_gesture_transformable.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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:vector_math/vector_math_64.dart' show Vector3;
 import 'transformations_demo_inertial_motion.dart';
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_inertial_motion.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_inertial_motion.dart
index 8e45c00b25..389e46a4d7 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo_inertial_motion.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo_inertial_motion.dart
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chromium 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 'dart:math';
 import 'package:flutter/material.dart';
 import 'package:vector_math/vector_math.dart' show Vector2;