PUSH Notifications in a Xamarin.Forms Proj

Hi,

I've spent a few hours trying to implement PUSH notifications in a Xamarin Forms project. I've followed numerous examples but most of which revolve around Xamarin.Droid or Xamarin.IOS apps rather than Xamarin.Forms apps. Is there a detailed example of how one can have a clean modular solution in a Xamarin.Forms solution. It seems like Xamarin really dropped the ball on this one.

Thanks
Shaun