class SKAudioNode : SKNode {
    init(AVAudioNode node: AVAudioNode?)
    init?(coder aDecoder: NSCoder)
    convenience init(fileNamed name: String)
    convenience init(URL url: NSURL)
    var avAudioNode: AVAudioNode?
    var autoplayLooped: Bool
    var positional: Bool
}

class SKAudioNode : SKNode, NSCoding {
    init(AVAudioNode node: AVAudioNode?)
    init?(coder aDecoder: NSCoder)
    convenience init(fileNamed name: String)
    convenience init(URL url: NSURL)
    var avAudioNode: AVAudioNode?
    var autoplayLooped: Bool
    var positional: Bool
}