anchor.diff:  
     Future<ObjectStore> get objectStore => _completer.future;
   
  -  void fireStatusChangeEvent() => _statusController.add(this);
  +  void _fireStatusChangeEvent() => _statusController.add(this);
   }
   
   /**
  
positive.code: 
    Future commit(String commitMessage);
  
    /**
     * An implementation method; this should generally not be called by clients of
     * this API.
     */
    void fireStatusChangeEvent();
  }
  
  /**
  
negative.code: 
    void _fireStatusChangeFor(Project project) {
      if (_operations[project] != null) {
        _operations[project]._fireStatusChangeEvent();
      }
    }
  }
  