gRPC status error comparison for https://github.com/powerman/check.
Import this package as a blank import in your test file or TestMain
to enable gRPC status comparison via check.Err/check.NotErr.
It also imports https://github.com/powerman/checkproto, so a single blank import covers both protobuf message and gRPC status comparison.