I think it might be nice to have a guide for either _type hinting_ or _resolving reflection warnings_ Some prior writing on the subject: - [Java Interop](http://clojure.org/reference/java_interop) - [Did you know about type hints?](https://kotka.de/blog/2012/06/Did_you_know_IX.html) - [Array Type Hints in Clojure](http://asymmetrical-view.com/2009/07/02/clojure-primitive-arrays.html)