return s.group.NewTimer(d)
	}
	return http2timeTimer{time.NewTimer(d)}
}

// afterFunc creates a new time.AfterFunc timer, or a synthetic timer in tests.
func (s *http2Server) afterFunc(d time.Duration, f func()) http2timer {
	if s.group != nil {
		return s.group.AfterFunc(d, f)
	}
	return http2timeTimer{time.AfterFunc(d, f)}
}

func (s *http2Server) initialConnRecvWindowSize() int32 {