Except if the public api of foo lib is only functions, which is the case for all clojure libs i've worked with.

EDIT: Ha, i just stumbled on this old yegge article, which is quite appropriate i think. With clojure APIs you think in verbs, so nouns are not that important

http://steve-yegge.blogspot.com/2006/03/execution-in-kingdom...

EDIT2 : perfect quote :

"In the remotest regions, beyond the Functional Kingdoms, lies a fabled realm called Lambda the Ultimate. In this place it is said that there are no nouns at all, only verbs!"

here you go ;)