Migrated test block 220 to Dart 2.0.

tests/lib_2/mirrors/generics_helper.dart

Index: tests/lib_2/mirrors/generics_helper.dart
diff --git a/tests/lib_2/mirrors/generics_helper.dart b/tests/lib_2/mirrors/generics_helper.dart
new file mode 100644
index 0000000000000000000000000000000000000000..da10962e44d8bbf18b52b86de6fba07265eb2e73
--- /dev/null
+++ b/tests/lib_2/mirrors/generics_helper.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2013, the Dart 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.
+
+library generics_helper;
+
+import 'package:expect/expect.dart';
+
+typeParameters(mirror, parameterNames) {
+  Expect.listEquals(
+      parameterNames, mirror.typeVariables.map((v) => v.simpleName).toList());
+}
+
+typeArguments(mirror, argumentMirrors) {
+  Expect.listEquals(argumentMirrors, mirror.typeArguments);
+}