public static void EnsureValid(GuidDataRequest data, string parent = null) { if (!ValidationFunctions.MaxLengthNullable(data.User, 255, out var messageUser)) { throw new ValidationException("user"._path(parent), messageUser); } if (!ValidationFunctions.ExpireNullable(data.Expire, out var expire, out var messageExpire)) { throw new ValidationException("expire"._path(parent), messageExpire); } }