SCNCameraController documentation?

The only code example I‘ve seen is in the WWDC video about SceneKit. He mentioned it’s possible to set up your own cameracontroller instead of the defaultCameraControler of the SCNView. It appears it is specifically to be used with allowsCameraControl = on, while I expected some way to assign it to a camera. The SCNCameraController does have a pointOfView property that can be set but if I set it to a camera that camera‘s behavior is not affected.

For anyone who might not have looked, there are some sparse comments included in the headers for the new symbols. Would also love to see documentation / samples, especially regarding use cases for the methods that weren't touched on in the WWDC talk.