nethttp/rule/header.go
func (h *headerRule) Valid(w http.ResponseWriter, r *http.Request) bool {
	return h.valid(w.Header().Get)
}
func (h *headerRule) Valid(w http.ResponseWriter, r *http.Request) bool {
	return h.valid(w.Header().Get)
}
func ( h * headerRule ) Valid ( w http . ResponseWriter , r * http . Request ) bool { return h . valid ( w . Header ( ) . Get ) }
// Valid validator
Valid validator