Wrapping leaf nodes in non polymer elements

runtime/observatory/lib/src/models/repositories/target.dart

+// Copyright (c) 2016, 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
+
+part of models;
+
+abstract class TargetChangeEvent {
+  TargetRepository get repository;
+}
+
+abstract class TargetRepository {
+  Stream<TargetChangeEvent> get onChange;
+
+  Target get current;
+  Iterable<Target> list();
+  void add(String);
+  void setCurrent(Target);
+  void delete(Target);
+}