}

// String returns a string representation of the connection.
func (c *Connection) String() string {
	return fmt.Sprintf("%s->%s", c.Local, c.Remote)
}

// StringReverse returns a string representation of the reverse connection.
func (c *Connection) StringReverse() string {
	return fmt.Sprintf("%s->%s", c.Remote, c.Local)
}

// State is a connection state.
type State uint32

		xhttp.DrainBody(respBody)
		return !isNetworkError(err)
	}
	var gridConn atomic.Pointer[grid.Connection]

	return &peerRESTClient{
		host: peer, restClient: restClient, gridHost: gridHost,
		gridConn: func() *grid.Connection {
			// Lazy initialization of grid connection.
			// When we create this peer client, the grid connection is likely not yet initialized.
			if gridHost == "" {

		if f != event.NamespaceFormat && f != event.AccessFormat {
			return fmt.Errorf("unrecognized format value")
		}
	}

	if p.ConnectionString != "" {
		// No pq API doesn't help to validate connection string
		// prior connection, so no validation for now.
	} else {
		// Some fields need to be specified when ConnectionString is unspecified
		if p.Port == "" {
			return fmt.Errorf("unspecified port")
		}

			}

		case <-time.After(ztunnelKeepAliveCheckInterval):
			// do a short read, just to see if the connection to ztunnel is
			// still alive. As ztunnel shouldn't send anything unless we send
			// something first, we expect to get an os.ErrDeadlineExceeded error
			// here if the connection is still alive.
			// note that unlike tcp connections, reading is a good enough test here.
			_, err := conn.readMessage(time.Second / 100)
			switch {

	}
	errFatal(h1.Register(local, handler1))
	errFatal(h2.Register(local, handler2))

	errFatal(h1.Register(remote, handler1))
	errFatal(h2.Register(remote, handler2))

	// local to remote connection
	remoteConn := local.Connection(remoteHost)
	const testPayload = "Hello Grid World!"

	start := time.Now()
	req := testRequest{Num: 1, String: testPayload}
	resp, err := h1.Call(context.Background(), remoteConn, &req)

}

// Returns a peer S3 client.
func newPeerS3Client(node Node) peerS3Client {
	var gridConn atomic.Pointer[grid.Connection]

	return &remotePeerS3Client{
		node: node,
		gridConn: func() *grid.Connection {
			// Lazy initialization of grid connection.
			// When we create this peer client, the grid connection is likely not yet initialized.
			if node.GridHost == "" {

						if src == dst {
							dst = (dst + 1) % len(managers)
						}
						local := managers[src]
						conn := local.Connection(hosts[dst])
						if conn == nil {
							b.Fatal("No connection")
						}
						// Send the payload.
						t := time.Now()
						resp, err := conn.Request(ctx, handlerTest, payload)
						latency += time.Since(t).Nanoseconds()

	var err error
	var conn *amqp091.Connection
	var ch *amqp091.Channel

	isAMQPClosedErr := func(err error) bool {
		if err == amqp091.ErrClosed {
			return true
		}

		if nerr, ok := err.(*net.OpError); ok {
			return (nerr.Err.Error() == "use of closed network connection")
		}

		return false
	}

	target.connMutex.Lock()

		return err
	}

	return target.store.Del(key.Name)
}

// Close - closes underneath connections to NATS server.
func (target *NATSTarget) Close() (err error) {
	close(target.quitCh)
	if target.stanConn != nil {
		// closing the streaming connection does not close the provided NATS connection.
		if target.stanConn.NatsConn() != nil {
			target.stanConn.NatsConn().Close()
		}

	listener "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
	route "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
	hcm "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/http_connection_manager/v3"
	tcp "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/tcp_proxy/v3"
	"sigs.k8s.io/yaml"

	"istio.io/istio/istioctl/pkg/util/proto"
	"istio.io/istio/pilot/pkg/networking/util"