Implement Apple TV ODR (On Demand Resources)?

I got quite confused when I tried to copy the code from this Apple TV ODR blogpost into my project [mastering-on-demand-resources-for-apple-platforms][1] The Unity TvOS Platform does not know about the iOS namespace. How is this done then? [1]: http://blogs.unity3d.com/2015/11/26/mastering-on-demand-resources-for-apple-platforms/