var screenshots: ScreenshotModel = ScreenshotModel()
- @IBOutlet var screenshotsController: NSArrayController!
- @IBOutlet weak var collectionView: NSCollectionView!
+ @IBOutlet private var screenshotsController: NSArrayController!
+ @IBOutlet private weak var collectionView: NSCollectionView!
private var selectionObservation: NSKeyValueObservation?