title: CATransform3D Key Paths with #keyPath
body: <p>Is it possible to use enhanced key path (as described <a href="https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/CoreAnimation_guide/Key-ValueCodingExtensions/Key-ValueCodingExtensions.html#//apple_ref/doc/uid/TP40004514-CH12-SW1" rel="noreferrer">here</a>) for a CATransform3D property in Swift 3 with new #keyPath keyword?</p>
  
  <p>In other words to replace </p>
  
  <pre><code>let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")
  </code></pre>
  
  <p>with something like </p>
  
  <pre><code>let scaleAnimation = CABasicAnimation(keyPath:  #keyPath(CALayer.transform.???))
  </code></pre>