     // MARK: - Private API
 
     private var annotationWindowController: PUIAnnotationWindowController?
-
-    private var maxTimestampWidth: CGFloat = Metrics.timePreviewXOffset
 
     weak var viewDelegate: PUITimelineViewDelegate?
 

    public var mediaDuration: Double = 0 {
        didSet {
            needsLayout = true

            let widestTimestampString = attributedString(for: mediaDuration, ofSize: Metrics.timePreviewTextSize)
            maxTimestampWidth = widestTimestampString.size().width + Metrics.timePreviewXOffset
        }
    }


        static let annotationDragThresholdHorizontal: CGFloat = 6
        static let textSize: CGFloat = 14.0
        static let timePreviewTextSize: CGFloat = 18.0
        static let timePreviewYOffset: CGFloat = -32.0
        static let timePreviewLeftOfMouseWidthMultiplier: CGFloat = 0.5
        static let timePreviewRightOfMouseWidthMultiplier: CGFloat = 0.7
    }

    private var borderLayer: PUIBoringLayer!
