Swift: Computed lazy variable example

gistfile1.swift

private lazy var debugLabel: UILabel = {
    let label = UILabel(frame: CGRectMake(20, 20, 200, 20))
    label.textColor = UIColor.redColor()
    label.backgroundColor = UIColor.whiteColor()
    return label
}()  // the parentheses tells swift to use the return value of the closure, not the closure itself.