func (res *ResponseRecorder) Body() []byte {
	var body []byte
	for i := range res.chunks {
		body = append(body, res.chunks[i]...)
	}
	return body
}
func (res *ResponseRecorder) Body() []byte {
	var body []byte
	for i := range res.chunks {
		body = append(body, res.chunks[i]...)
	}
	return body
}
// Body joins the chunks to one []byte slice, this is the full body