It's quite interesting:

    I built a layer of clojure code on top of the JNI bindings to get
    an entirely functional interface to vba-rerecording. This
    interface treats state of the emulator as an immutable object, and
    allows me to do everything I could do with the lower level C
    interface in a functional manner. Using this functional code, I
    wrote search programs that take a particular game-state and try
    out different combinations of button presses to get any desired
    effect. By combining different styles of search with different
    initial conditions