// []byte -> ([]byte, error) requests.
// subroutes are joined with "/" to a single subroute.
func (m *Manager) RegisterSingleHandler(id HandlerID, h SingleHandlerFn, subroute ...string) error {
	if !id.valid() {
		return ErrUnknownHandler
	}
	s := strings.Join(subroute, "/")
	if debugPrint {
		fmt.Println("RegisterSingleHandler: ", id.String(), "subroute:", s)
	}

	if len(subroute) == 0 {

	}
	return c
}

// Subroute returns a static subroute for the connection.
func (c *Connection) Subroute(s string) *Subroute {
	if c == nil {
		return nil
	}
	return &Subroute{
		Connection: c,
		route:      s,
		subID:      makeSubHandlerID(0, s),
		trace:      c.trace.subroute(s),
	}
}

// Subroute adds a subroute to the subroute.
// The subroutes are combined with '/'.

		return collectInternodeStats(httpTraceHdrs(f))
	}

	server := &peerRESTServer{}
	subrouter := router.PathPrefix(peerRESTPrefix).Subrouter()
	subrouter.Methods(http.MethodPost).Path(peerRESTVersionPrefix + peerRESTMethodHealth).HandlerFunc(h(server.HealthHandler))

		// Any non-nil error sent as response means no more responses are sent.
		Handle StreamHandlerFn

		// Subroute for handler.
		// Subroute must be static and clients should specify a matching subroute.
		// Should not be set unless there are different handlers for the same HandlerID.
		Subroute string

		// OutCapacity is the output capacity. If <= 0 capacity will be 1.
		OutCapacity int

				endpoint: endpoint,
			}

			subrouter := router.PathPrefix(path.Join(storageRESTPrefix, endpoint.Path)).Subrouter()

			subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodHealth).HandlerFunc(h(server.HealthHandler))
			subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodAppendFile).HandlerFunc(h(server.AppendFileHandler))

}

func newMuxStream(ctx context.Context, msg message, c *Connection, handler StreamHandler) *muxServer {
	var cancel context.CancelFunc
	ctx = setCaller(ctx, c.remote)
	if len(handler.Subroute) > 0 {
		ctx = setSubroute(ctx, handler.Subroute)
	}
	if msg.DeadlineMS > 0 {
		ctx, cancel = context.WithTimeout(ctx, time.Duration(msg.DeadlineMS)*time.Millisecond+c.addDeadline)
	} else {
		ctx, cancel = context.WithCancel(ctx)
	}

	if err != nil {
		return err
	}
	if msg.Flags&FlagSubroute != 0 {
		if m.subroute == nil {
			return fmt.Errorf("internal error: subroute not defined on client")
		}
		hid := m.subroute.withHandler(msg.Handler)
		before := len(dst)
		dst = append(dst, hid[:]...)
		if debugPrint {
			fmt.Println("Added subroute", hid.String(), "to message", msg, "len", len(dst)-before)
		}
	}

				// to match for `<bucket>`
				return host != minioReservedBucket+"."+domainName
			}).Host("{bucket:.+}."+domainName).Subrouter())
		} else {
			routers = append(routers, apiRouter.Host("{bucket:.+}."+domainName).Subrouter())
		}
	}
	routers = append(routers, apiRouter.PathPrefix("/{bucket}").Subrouter())

	for _, router := range routers {
		// Register all rejected object APIs
		for _, r := range rejectedObjAPIs {

					Embedded:  *i,
				}
				n++
			}
			return nil
		}, "subroute", "1"))
	}
	register(local)
	register(remote)

	// local to remote
	remoteConn := local.Connection(remoteHost)
	const testPayload = "Hello Grid World!"
	// Add subroute
	remoteSub := remoteConn.Subroute(strings.Join([]string{"subroute", "1"}, "/"))

	start := time.Now()

)

// registerMetricsRouter - add handler functions for metrics.
func registerMetricsRouter(router *mux.Router) {
	// metrics router
	metricsRouter := router.NewRoute().PathPrefix(minioReservedBucketPath).Subrouter()
	authType := prometheusAuthType(strings.ToLower(env.Get(EnvPrometheusAuthType, string(prometheusJWT))))

	auth := AuthMiddleware
	if authType == prometheusPublic {
		auth = NoAuthMiddleware
	}