// Validate implements cli.Validator interface
func (argv *argT) Validate(ctx *cli.Context) error {
if argv.Age < 0 || argv.Age > 300 {
return fmt.Errorf("age %d out of range", argv.Age)
}
if argv.Gender != "male" && argv.Gender != "female" {
return fmt.Errorf("invalid gender %s", ctx.Color().Yellow(argv.Gender))
}
return nil
}