}

type http2serverInternalState struct {
	mu          sync.Mutex
	activeConns map[*http2serverConn]struct{}
}

func (s *http2serverInternalState) registerConn(sc *http2serverConn) {
	if s == nil {
		return // if the Server was used without calling ConfigureServer
	}
	s.mu.Lock()
	s.activeConns[sc] = struct{}{}
	s.mu.Unlock()
}