How to write clojure documentation for a single function in a protocol? -

let's have protocol this:

(defprotocol x   (y [this z]))

how write documentation targeted function y?

the normal way doing be:

(defn y   "some documentation"   [])

but if do:

(defprotocol x   (y     "some documentation"      [this z]))

i following exception:

java.lang.illegalargumentexception: parameter declaration missing

so how add kind of documentation?

(defprotocol x   (y [this z] "some documentation"))

Earony