public SettingsViewModel()
        {
            SchoolCollectionViewModel = new ChipCollectionViewModel <SchoolBookmark>(DataStore.SchoolBookmarks, ChipViewModel.Create);
            Schools = SchoolCollectionViewModel.ChipViewModels;

            SchoolClassCollectionViewModel = new ChipCollectionViewModel <SchoolClassBookmark>(DataStore.SchoolClassBookmarks, ChipViewModel.Create);
            SchoolClasses = SchoolClassCollectionViewModel.ChipViewModels;
        }
 public NewSchoolClassesViewModel()
 {
     CollectionViewModel = new ChipCollectionViewModel <SchoolClassBookmark>(DataStore.NewSchoolClassBookmarks, ChipViewModel.Create);
     SchoolClasses       = CollectionViewModel.ChipViewModels;
 }