These were helpful for some autogenerated code
I'm working with.

Change-Id: I7b89c69552ca99bf560a14bfbcd6bd238595ddf6
Reviewed-on: https://go-review.googlesource.com/24742Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>