return v.Warning, v.Err
}

func (v Validation) Error() string {
	if v.Err == nil {
		return ""
	}
	return v.Err.Error()
}

// WrapWarning turns an error into a Validation as a warning
func WrapWarning(e error) Validation {
	return Validation{Warning: e}
}

// wrapper around multierror.Append that enforces the invariant that if all input errors are nil, the output