Converted Observatory object-common element

runtime/observatory/lib/src/models/objects/inbound_references.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 Notification {}
-
-abstract class ExceptionNotification implements Notification{
-  Exception get exception;
-  /// [optional]
-  StackTrace get stacktrace;
+abstract class InboundReferences {
+  Iterable<InboundReference> get elements;
 }
 
-abstract class EventNotification implements Notification{
-  Event get event;
+abstract class InboundReference {
+  ObjectRef get source;
+  /// [optional]
+  ObjectRef get parentField;
+  /// [optional]
+  int get parentListIndex;
+  /// [optional]
+  int get parentWordOffset;
 }