Make retained size human-readable.

runtime/bin/vmservice/client/lib/src/service/object.dart

 // Copyright (c) 2014, 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 service;
 
 /// A [ServiceObject] is an object known to the VM service and is tied
 /// to an owning [Isolate].
 abstract class ServiceObject extends Observable {
   /// The owner of this [ServiceObject].  This can be an [Isolate], a
@@ skipping 1105 matching lines @@
       oldSpace.update(allocationStats['old']);
     }
   }
 
   void _addToChildren(Class cls) {
     if (children.contains(cls)) {
       return;
     }
     children.add(cls);
   }
+  
+  Future<ServiceObject> get(String command) {
+    return isolate.get(id + "/$command");
+  }
 }
 
 class ScriptLine extends Observable {
   final int line;
   final String text;
   @observable int hits;
   ScriptLine(this.line, this.text);
 }
 
 class Script extends ServiceObject {
@@ skipping 684 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }