 class ReadingListsViewController: ColumnarCollectionViewController {
     
     let dataStore: MWKDataStore
-    let managedObjectContext: NSManagedObjectContext
     let readingListsController: ReadingListsController
     var fetchedResultsController: NSFetchedResultsController<ReadingList>!
     var collectionViewUpdater: CollectionViewUpdater<ReadingList>!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        setupFetchedResultsControllerOrdered(by: "name", ascending: true)
        collectionViewUpdater = CollectionViewUpdater(fetchedResultsController: fetchedResultsController, collectionView: collectionView)
        collectionViewUpdater?.delegate = self


    
    init(with dataStore: MWKDataStore) {
        self.dataStore = dataStore
        self.readingListsController = dataStore.readingListsController
        super.init()
    }
