Can one of the admins verify this patch?

Do we have a test that covers this case? Can be added later, but please file an issue to do so if that's the route taken.

Currently we do not have unit tests for code generation. See #1225 for discussions.

Oh no, I wasn't asking for a unit test. That's it's own beast (and I also don't like the golden-file testing approach). I was asking if any of our existing protos in open-source actually exhibit this behavior (no rpc method defined). I think the answer is no, and it would be nice to have coverage of that case to make sure that nobody strips out this reference in the future thinking, "Hmm, useless void ref" . I'm fine with an issue filed even if the proto isn't filled in now.

All C++ tests pass, so I declare this PR mergeworthy.