What is the equivalent of a TemplateBinding in Forms?

So I have a control that is going to become a sort of ContentView with a content view as a child so that I can bind to my View property, why reinvent the wheel?

So this is sort of what I want:
<?xml version="1.0" encoding="utf-8" ?>

But I cant figure out how to bind it to the ContentTestControl because it's name is unknown...

Thanks!
Brad