memAvailableMD = NewGaugeMD(memAvailable, "Available memory on the node")
)

// loadMemoryMetrics - `MetricsLoaderFn` for node memory metrics.
func loadMemoryMetrics(ctx context.Context, m MetricValues, c *metricsCache) error {
	memMetrics, err := c.memoryMetrics.Get()
	if err != nil {
		metricsLogIf(ctx, err)
		return err
	}

	m.Set(memTotal, float64(memMetrics.Total))

	return
}

// ErrClientClosed returned when *Client is closed.
var ErrClientClosed = errors.New("rest client is closed")

// CallWithHTTPMethod - make a REST call with context, using a custom HTTP method.
func (c *Client) CallWithHTTPMethod(ctx context.Context, httpMethod, rpcMethod string, values url.Values, body io.Reader, length int64) (reply io.ReadCloser, err error) {
	switch atomic.LoadInt32(&c.connected) {
	case closed:

    protected int doExecute(DefaultEncryptInvoker.LocalContext context) throws Exception {
        String encrypted = context.reader.readLine("Enter the password to decrypt: ");
        if (secDispatcher.isAnyEncryptedString(encrypted)) {
            context.terminal.writer().println(secDispatcher.decrypt(encrypted));
            return OK;
        } else {

		"Cluster object version count distribution", "range")
)

// loadClusterUsageObjectMetrics - reads cluster usage metrics.
//
// This is a `MetricsLoaderFn`.
func loadClusterUsageObjectMetrics(ctx context.Context, m MetricValues, c *metricsCache) error {
	dataUsageInfo, err := c.dataUsageInfo.Get()
	if err != nil {
		metricsLogIf(ctx, err)
		return nil
	}

	// data usage has not captured any data yet.

The handler function has this signature.

Sample handler:
```go
    handler :=  func(ctx context.Context, payload []byte, in <-chan []byte, out chan<- []byte) *RemoteErr {
        fmt.Println("Got request with initial payload", p, "from", GetCaller(ctx context.Context))
        fmt.Println("Subroute:", GetSubroute(ctx))
        for {
            select {
            case <-ctx.Done():

			key := msgPath(fmt.Sprintf("%s.%s", bucket, domainName), c.prefixPath)
			key = key + etcdPathSeparator + ip
			ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
			_, err = c.etcdClient.Put(ctx, key, string(bucketMsg))
			cancel()
			if err != nil {
				ctx, cancel = context.WithTimeout(context.Background(), defaultContextTimeout)
				c.etcdClient.Delete(ctx, key)
				cancel()
				return err
			}
		}

}

void TFE_ContextExportRunMetadata(TFE_Context* ctx, TF_Buffer* buf,
                                  TF_Status* status) {
  auto* context = tensorflow::unwrap(ctx);
  status->status = context->AsyncWait();
  if (!status->status.ok()) return;
  auto run_metadata = context->ExportRunMetadata();
  status->status = MessageToBuffer(*run_metadata, buf);
}

namespace {

	if err == nil || !errors.Is(err, errNoSuchUser) {
		c.Fatalf("expected err(%s) but got (%s)", errNoSuchUser, err)
	}
}

func (s *TestSuiteIAM) SFTPInvalidServiceAccountPassword(c *check) {
	ctx, cancel := context.WithTimeout(context.Background(), testDefaultTimeout)
	defer cancel()

	accessKey, secretKey := mustGenerateCredentials(c)
	err := s.adm.SetUser(ctx, accessKey, secretKey, madmin.AccountEnabled)
	if err != nil {

}

// client to talk to bootstrap NEndpoints.
type bootstrapRESTClient struct {
	gridConn *grid.Connection
}

// Verify function verifies the server config.
func (client *bootstrapRESTClient) Verify(ctx context.Context, srcCfg *ServerSystemConfig) (err error) {
	if newObjectLayerFn() != nil {
		return nil
	}

	recvCfg, err := serverVerifyHandler.Call(ctx, client.gridConn, grid.NewMSS())
	if err != nil {
		return err

	addedPods   atomic.Int32
	addError    error
	delError    error
}

func (f *fakeZtunnel) Run(ctx context.Context) {
}

func (f *fakeZtunnel) PodDeleted(ctx context.Context, uid string) error {
	f.deletedPods.Add(1)
	return f.delError
}

func (f *fakeZtunnel) PodAdded(ctx context.Context, pod *corev1.Pod, netns Netns) error {
	f.addedPods.Add(1)
	return f.addError
}