header := make(Header, len(regularFields))
	res := &Response{
		Proto:      "HTTP/2.0",
		ProtoMajor: 2,
		Header:     header,
		StatusCode: statusCode,
		Status:     status + " " + StatusText(statusCode),
	}
	for _, hf := range regularFields {
		key := http2canonicalHeader(hf.Name)
		if key == "Trailer" {
			t := res.Trailer
			if t == nil {
				t = make(Header)