     private var registeredPresentors = [String: CKMessagePresenting.Type]()
     private var usingPresentors = [IndexPath: CKMessagePresenting]()
     private var unusedPresentors = [String: [CKMessagePresenting]]()
-    private var pretchedPresentors = [IndexPath: CKMessagePresenting]()
+    private var prefetchedPresentors = [IndexPath: CKMessagePresenting]()
     
     // MARK: - Private functions
     

        super.didReceiveMemoryWarning()
        
        unusedPresentors.removeAll()
        pretchedPresentors.removeAll()
        usingPresentors.removeAll()
        
        messagesView.collectionViewLayout.invalidateLayout()

    fileprivate func debuggingPresentors(place: StaticString = #function) {
        print("===> \(place) usingPresentors: \(usingPresentors)")
        print("===> \(place) unusedPresentors: \(unusedPresentors)")
        print("===> \(place) pretchedPresentors: \(prefetchedPresentors)")
        print("")
        print("")
    }
