I'm on a mission to destroy simple_send_mapped

but am out of time for the night. There are two cases yet I haven't been
able to destroy, not being enough of a Rubyist and being too new to this
project to really understand them. As much as I love metaprogramming, I
think that simple_send_mapped is unnecessary metaprogramming. Can you
finish what I've started, Gilli? Good working with you tonight, as
always! What a blast!