anchor.diff:          _userDataProvider.refreshToken();
         }
         _error = _messageService.error;
  +      _statusText = NotificationsConstants.statusFetchProblem;
       }
   
       _isLoading = false;
  
positive.code:   bool get isLoading => _isLoading;
    String get error => _error;
    DateTime get lastUpdated => _lastUpdated;
  
    List<MessageElement> get messages {
      if (_messages != null) {
  
negative.code: import 'package:campus_mobile_experimental/core/constants/notifications_constants.dart';
  import 'package:campus_mobile_experimental/core/data_providers/user_data_provider.dart';
  import 'package:campus_mobile_experimental/core/models/message_model.dart';
  import 'package:flutter/material.dart';
  