var google.golang.org/protobuf/internal/impl.nilBytes
2 uses
google.golang.org/protobuf/internal/impl (current package)
message_reflect_field.go#L251: nilBytes = reflect.ValueOf([]byte(nil))
message_reflect_field.go#L331: rv.Set(nilBytes) // do not preserve presence
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)