These need to be converted back to the appropriate label/type enums to produce valid descriptor protos under editions.
Change-Id: Ife04c4c556ffb06d1bc477725ff49058928a75ca
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/575916
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Stapelberg <stapelberg@google.com>
Reviewed-by: Michael Stapelberg <stapelberg@google.com>
