Might it be better to have a # fn foo(my_delegate: &WebViewDelegate) and then a no_run for this?

Oh okay

Might it be better to have a # fn foo(my_delegate: &WebViewDelegate) and then a no_run for this?

I guess we'll still need a servo instance, url, and rendering context to make it compile, no?

Also, what is foo here? Do you mean to say a dummy implementation of WebViewDelegate? i.e

struct MyDelegate; 
impl WebViewDelegate for MyDelegate {}

Yes something like that.
Basically if we can have

# fn foo(servo: &Servo, rendering_context: Rc<dyn RenderingContext>) {
struct MyDelegate; 
impl WebViewDelegate for MyDelegate {}

 let webview = WebViewBuilder::new(&servo, rendering_context)
url(url)
.delegate(Rc::new(my_delegate))
.build();
# }

As far as I understand the rustdoc documentation this should work because it is code that compiles.

But if there is something more to do then it might not be worth it and this way is fine.