I was looking at docs for tokio-proto, and noticed that there were helpful tooltips for types defined in the crate, but not for types like Handle and FramedIo, whice are defined in other crates.

It would be great if, even if they aren't clickable, types outside of the crate would get tooltips showing the full path of the type, to hint at where to look to learn more. So Handle would show a tooltip with tokio_core::reactor::Handle and FramedIo would show one with tokio_core::io::FramedIo.