func (m *muxClient) addErrorNonBlockingClose(respHandler chan<- Response, err error) {
	m.respMu.Lock()
	defer m.respMu.Unlock()
	if !m.closed {
		m.respErr.Store(&err)
		// Do not block.
		select {
		case respHandler <- Response{Err: err}:
			xioutil.SafeClose(respHandler)
		default:
			go func() {
				respHandler <- Response{Err: err}
				xioutil.SafeClose(respHandler)
			}()
		}

	if !ok {
		supported, _ := MediaTypesForSerializer(ns)
		return mediaType, runtime.SerializerInfo{}, NewNotAcceptableError(supported)
	}
	// TODO: move into resthandler
	info := mediaType.Accepted
	if (mediaType.Pretty || isPrettyPrint(req)) && info.PrettySerializer != nil {
		info.Serializer = info.PrettySerializer
	}
	return mediaType, info, nil
}

	// LoopbackClientConfig is a config for a privileged loopback connection to the API server
	LoopbackClientConfig *restclient.Config

	// minRequestTimeout is how short the request timeout can be.  This is used to build the RESTHandler
	minRequestTimeout time.Duration

	// ShutdownTimeout is the timeout used for server shutdown. This specifies the timeout before server
	// gracefully shutdown returns.
	ShutdownTimeout time.Duration