nethttp/response_recorder.go
func ReleaseResponseRecorder(res *ResponseRecorder) {
	res.underline = nil
	res.statusCode = 0
	res.chunks = res.chunks[0:0]
	rpool.Put(res)
}
func ReleaseResponseRecorder(res *ResponseRecorder) {
	res.underline = nil
	res.statusCode = 0
	res.chunks = res.chunks[0:0]
	rpool.Put(res)
}
// ReleaseResponseRecorder releases a ResponseRecorder which has been previously received by AcquireResponseRecorder