var github.com/google/uuid.Nil

4 uses

	github.com/google/uuid (current package)
		hash.go#L19: 	Nil           UUID // empty UUID, all zeros
		null.go#L37: 		nu.UUID, nu.Valid = Nil, false
		version4.go#L51: 		return Nil, err
		version4.go#L65: 			return Nil, err