anchor.diff:  
     Map<String, dynamic> toMap() {
       final map = <String, dynamic>{
  +      'total': _totalCount,
  +      'owned': _ownedCount,
         'state': _stateMap,
         'status': _statusMap,
       };
  
positive.code: 
    void add(Job job) {
      _totalCount++;
      if (job.state == JobState.available) {
        _availableCount++;
      }
  
negative.code:   final bool _collectFailed;
    final _failedPackages = new Set<String>();
    int _totalCount = 0;
    int _ownedCount = 0;
    int _availableCount = 0;
  
    _Stat({bool collectFailed: false}) : _collectFailed = collectFailed;
  