render.go
func (r *Render) Error(status int, message ...string) {
	r.WriteHeader(status)
	if len(message) > 0 {
		r.Write([]byte(message[0]))
	}
}
func (r *Render) Error(status int, message ...string) {
	r.WriteHeader(status)
	if len(message) > 0 {
		r.Write([]byte(message[0]))
	}
}
// Error writes the given HTTP status to the current ResponseWriter