TF_RETURN_IF_ERROR(
        ops::Sub(ctx, fPlus.get(), fMinus.get(), f_outputs, "sub_top"));
    AbstractTensorHandlePtr fDiff(f_outputs[0]);

    // Calculate using the difference quotient definition:
    // (f(theta + eps) - f(theta - eps)) / (2 * eps).
    TF_RETURN_IF_ERROR(
        ops::Div(ctx, fDiff.get(), two_eps.get(), f_outputs, "diff_quotient"));

	}
}

func getClusterHealthMetrics(opts MetricsGroupOpts) *MetricsGroupV2 {
	mg := &MetricsGroupV2{
		cacheInterval:    10 * time.Second,
		metricsGroupOpts: opts,
	}
	mg.RegisterRead(func(ctx context.Context) (metrics []MetricV2) {
		objLayer := newObjectLayerFn()

		opts := HealthOptions{}
		result := objLayer.Health(ctx, opts)

		metrics = make([]MetricV2, 0, 2+4*len(result.ESHealth))

			if err != nil {
				t.Fatalf("webhook fixing failed with error: %v", err)
			}
			opts := &GenerateOptions{
				ManifestsPath: filepath.Join(env.IstioSrc, "manifests"),
			}
			if tc.userManaged {
				opts.UserManaged = true
			}
			webhookYAML, err := generateValidatingWebhook(webhookConfig, opts)
			if err != nil {
				t.Fatalf("tag webhook YAML generation failed with error: %v", err)
			}

}

// Open initialize db session based on dialector
func Open(dialector Dialector, opts ...Option) (db *DB, err error) {
	config := &Config{}

	sort.Slice(opts, func(i, j int) bool {
		_, isConfig := opts[i].(*Config)
		_, isConfig2 := opts[j].(*Config)
		return isConfig && !isConfig2
	})

	for _, opt := range opts {
		if opt != nil {
			if applyErr := opt.Apply(config); applyErr != nil {

			// filtering requested to return by caller.
			return nil
		}
	}

	return nil
}

// Return N entries at the directory dirPath.
func readDirWithOpts(dirPath string, opts readDirOpts) (entries []string, err error) {
	// Ensure we don't pick up files as directories.
	globAll := filepath.Clean(dirPath) + `\*`
	globAllP, err := syscall.UTF16PtrFromString(globAll)
	if err != nil {

// on it must match the list of operations in ops.
type testFile struct {
	ops fileOps
	pos int64
}

func (f *testFile) Read(b []byte) (int, error) {
	if len(b) == 0 {
		return 0, nil
	}
	if len(f.ops) == 0 {
		return 0, io.EOF
	}
	s, ok := f.ops[0].(string)
	if !ok {
		return 0, errors.New("unexpected Read operation")
	}

	n := copy(b, s)
	if len(s) > n {
		f.ops[0] = s[n:]
	} else {
		f.ops = f.ops[1:]

			return updatedAt, auth.ErrInvalidSecretKeyLength
		}
		cr.SecretKey = opts.secretKey
	}

	if opts.name != "" {
		cr.Name = opts.name
	}

	if opts.description != "" {
		cr.Description = opts.description
	}

	if opts.expiration != nil {
		expirationInUTC := opts.expiration.UTC()
		if err := validateSvcExpirationInUTC(expirationInUTC); err != nil {
			return updatedAt, err
		}

	// Uncomment this to use MinIO API operations by initializing minio
	// client with obtained credentials.

	opts := &minio.Options{
		Creds:        sts,
		BucketLookup: minio.BucketLookupAuto,
	}

	u, err := url.Parse(stsEndpoint)
	if err != nil {
		log.Fatal(err)
	}

	clnt, err := minio.New(u.Host, opts)
	if err != nil {
		log.Fatal(err)
	}

	d := bytes.NewReader([]byte("Hello, World"))

	// Calling ReadCompressed with true accomplishes that.
	object := gcs.client.Bucket(gcs.Bucket).Object(gcs.getDest(key)).ReadCompressed(true)

	r, err = object.NewRangeReader(ctx, opts.startOffset, opts.length)
	if err != nil {
		return nil, gcsToObjectError(err, gcs.Bucket, key)
	}
	return r, nil
}

func (gcs *warmBackendGCS) Remove(ctx context.Context, key string, rv remoteVersionID) error {

				return HandlerForRetrieveDebugList(kubeClient, *centralOpts, writer, istioNamespace)
			}
		}
	}
	return nil, nil
}

func DebugCommand(ctx cli.Context) *cobra.Command {
	var opts clioptions.ControlPlaneOptions
	var centralOpts clioptions.CentralControlPlaneOptions

	debugCommand := &cobra.Command{
		Use:   "internal-debug [<type>/]<name>[.<namespace>]",