     let collectionView = UICollectionView(frame: .zero, collectionViewLayout: self.collectionViewLayout)
     collectionView.backgroundColor = .white
     collectionView.showsHorizontalScrollIndicator = false
-    collectionView.isScrollEnabled = false
     return collectionView
   }()
 

  /// _Default: .scrolling_
  open var menuInteraction: PagingMenuInteraction {
    get { return options.menuInteraction }
    set { options.menuInteraction = newValue }
  }

  /// Determine how the selected menu item should be aligned when it

  }()

  fileprivate let options: PagingOptions
  fileprivate let sizeCache: PagingSizeCache<T>
  fileprivate var swipeGestureRecognizerLeft: UISwipeGestureRecognizer?
  fileprivate var swipeGestureRecognizerRight: UISwipeGestureRecognizer?
  fileprivate var didLayoutSubviews: Bool = false
  fileprivate var dataStructure: PagingDataStructure<T>
  
  fileprivate var stateMachine: PagingStateMachine<T>? {
    didSet {
      handleStateMachineUpdate()
