Converted Observatory object-common element

runtime/observatory/lib/src/repositories/retaining_path.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 repositories;
+
+class RetainingPathRepository implements M.RetainingPathRepository {
+
+  Future<M.RetainingPath> get(M.IsolateRef i, String id) async {
+    S.Isolate isolate = i as S.Isolate;
+    assert(isolate != null);
+    final response = await isolate.invokeRpc('_getRetainingPath', {
+        'targetId' : id,
+        'limit': 100
+    });
+    return new S.RetainingPath(response);
+  }
+}