anchor.diff:    //Fetch messages
     void fetchMessages() async {
       _isLoading = true;
  +    _statusText = NotificationsConstants.statusFetching;
       _error = null;
       notifyListeners();
       _previousTimestamp = DateTime.now().millisecondsSinceEpoch;
  
positive.code:   DateTime _lastUpdated;
    String _error;
    int _previousTimestamp;
  
    /// MODELS
    List<MessageElement> _messages;
  
negative.code:   bool get isLoading => _isLoading;
    String get error => _error;
    DateTime get lastUpdated => _lastUpdated;
    String get statusText => _statusText;
  
    List<MessageElement> get messages {
      if (_messages != null) {
  