anchor.diff:      }
       _loaded = true;
       loading = false;
  -
  +    runnable = map['runnable'] == true;
       _upgradeCollection(map, isolate);
       originNumber = int.parse(map['_originNumber'], onError:(_) => null);
       rootLibrary = map['rootLib'];
  
positive.code:       clazz = map['class'];
      }
  
      // Load the full class object.
      clazz?.load();
  
      if (mapIsRef) {
        return;
  
negative.code:   void _update(ObservableMap map, bool mapIsRef) {
      _loaded = true;
      _upgradeCollection(map, owner);
  
      assert(map['isolate'] == null || owner == map['isolate']);
      timestamp =
          new DateTime.fromMillisecondsSinceEpoch(map['timestamp']);
  