The new validator package (v9) introduces the ```oneof``` tag: https://godoc.org/gopkg.in/go-playground/validator.v9#hdr-One_Of There is no more need to document the ```tonic``` enum tag IMO.
The new validator package (v9) introduces the
oneoftag: https://godoc.org/gopkg.in/go-playground/validator.v9#hdr-One_OfThere is no more need to document the
tonicenum tag IMO.