Swift 3.0 NSArray valueForKey
<p>In Swift 2.3 I've used this code, but after updating Swift to version 3.0 my code can't compile. Thank you!</p>

<pre><code>var waterfallLibrary: NSArray = []
cell!.textLabel?.text = String(self.waterfallLibrary.valueForKey("songName").objectAtIndex(indexPath.row))
</code></pre>