http.go
func (resp *Response) SetBodyRaw(body []byte) {
	resp.ResetBody()
	resp.bodyRaw = body
}
func (resp *Response) SetBodyRaw(body []byte) {
	resp.ResetBody()
	resp.bodyRaw = body
}
// SetBodyRaw sets response body, but without copying it.
//
// From this point onward the body argument must not be changed.