Cannot find 'ActivityData' in scope

[zeeshanbiit]

private lazy var activityData : ActivityData = {
let size = CGSize(width: 30, height: 30)
let activityData = ActivityData(size: size, message: nil, messageFont: nil, messageSpacing: nil, type: NVActivityIndicatorType.ballRotateChase, color: UIColor.white, padding: nil, displayTimeThreshold: nil, minimumDisplayTime: nil, backgroundColor: .clear, textColor: nil)
return activityData
}()