Aliases in protocol functions should work?

[borkdude]

(ns foo) (defprotocol Foo (foo [this]))
(ns bar (:require [foo :as f]))

(extend-type String
  f/Foo
  (f/foo [this] (subs this 0 1)))

(f/foo "foo") ;;=> "f" 

Note that Clojure totally ignores the alias:

(extend-type String
  f/Foo
  (foobarf/foo [this] (subs this 0 1)))

also works.

It seems CLJS only supports this if the namespace really exists.