Prerequisite with dynamic arguments

[viebel]

I'd like to be able to define prerequisite with a dynamic argument and access this argument in the mocking value. For instance, I'd like to be able to write something like this:

(defn bar [x])
(defn foo [x]
  (bar x))

(fact
 (foo 2) => 2
 (provided (bar anything) => anything))

The problem in this code is that the anything after the arrow doesn't have the value of the anything before the arrow.

Does my request make sense?