tree e7966a7bb641a6fc538307c384a10f6228d2785b
parent 90bca2f6a1db443b1e27f0174788a64bb98fd530
author Jason Wang <jasonwzm@google.com> 1566579586 -0700
committer Marcel van Lohuizen <mpvl@golang.org> 1566584675 +0000

encoding/protobuf: make map field as not required by default

in proto3 all fields are optional, thus making the map field optional as well.

Change-Id: I5397adf6bfc990d6af248acef5bc4dcdf89c5cdd
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2981
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>