Is there any way of knowing http protocol using fetch?

[jupegarnica]

In the fetch Response there is not clue about which prococol is used (HTTP/1.1 or HTTP/2).
I think is not even consider in the standard:
https://fetch.spec.whatwg.org/#response-class

So, anyone knows a way to know the procolo used. Maybe some low level api? Deno.createHttpClient?https://doc.deno.land/deno/unstable/~/Deno.createHttpClient