public StudyFlashCardSetSettingsViewModel(IMvxMessenger messenger, IFlashCardManager manager, IStudySettingsService settingsService)
        {
            _messenger = messenger;
            _manager = manager;
            _settingsService = settingsService;
            _settings = _settingsService.GetStudySettings();

            SetList = CreateSetList(manager.GetSetList());

            //   _token = _messenger.Subscribe<SelectedSetChangedMessage>();
            /*_showDefinition = true;
            _showPinyin = true;

            _canShowCharacters = true;
             */
        }