 public class LightboxController: UIViewController {
 
   var images = [UIImage]()
+  var page = 0
 
   public lazy var dataSource: LightboxDataSource = { [unowned self] in
     let dataSource = LightboxDataSource(data: self.images)

// MARK: - UICollectionViewDelegate

extension LightboxController: UICollectionViewDelegate { }

  lazy var collectionViewLayout: UICollectionViewLayout = {
    let layout = UICollectionViewFlowLayout()
    layout.scrollDirection = .Horizontal
    layout.minimumInteritemSpacing = 0
    layout.minimumLineSpacing = 0
    layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    return layout
    }()

