type RWLocker interface {
	GetLock(ctx context.Context, timeout *dynamicTimeout) (lkCtx LockContext, timedOutErr error)
	Unlock(lkCtx LockContext)
	GetRLock(ctx context.Context, timeout *dynamicTimeout) (lkCtx LockContext, timedOutErr error)
	RUnlock(lkCtx LockContext)
}

// LockContext lock context holds the lock backed context and canceler for the context.
type LockContext struct {
	ctx    context.Context
	cancel context.CancelFunc
}

	cache.InitOnce(2*time.Second, Opts{},
		func(ctx context.Context) (time.Time, error) {
			return time.Now(), slowCaller(ctx)
		},
	)

	ctx, cancel := context.WithCancel(context.Background())
	cancel() // cancel context to test.

	_, err := cache.GetWithCtx(ctx)
	if !errors.Is(err, context.Canceled) {
		t.Fatalf("expected context.Canceled err, got %v", err)
	}

	ctx, cancel = context.WithCancel(context.Background())
	defer cancel()

	return p, nil
}

func (iamOS *IAMObjectStore) loadPolicyDoc(ctx context.Context, policy string, m map[string]PolicyDoc) error {
	p, err := iamOS.loadPolicy(ctx, policy)
	if err != nil {
		return err
	}
	m[policy] = p
	return nil
}

func (iamOS *IAMObjectStore) loadPolicyDocs(ctx context.Context, m map[string]PolicyDoc) error {
	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

        }

        container.getLoggerManager().setThresholds(toPlexusLoggingLevel(context.loggerLevel));
        customizeContainer(context, container);

        // refresh logger in case container got customized by spy
        org.slf4j.Logger l = context.loggerFactory.getLogger(this.getClass().getName());
        context.logger = (level, message, error) -> l.atLevel(org.slf4j.event.Level.valueOf(level.name()))

	Lock(ctx context.Context, args LockArgs) (bool, error)

	// Do read unlock for given LockArgs. It should return
	// * a boolean to indicate success/failure of the operation
	// * an error on failure of unlock request operation.
	// Canceling the context will abort the remote call.
	// In that case, the resource may or may not be unlocked.
	RUnlock(ctx context.Context, args LockArgs) (bool, error)

func (s StubKMS) Version(ctx context.Context) (string, error) {
	return "stub", nil
}

// APIs returns supported APIs
func (s StubKMS) APIs(ctx context.Context) ([]madmin.KMSAPI, error) {
	return []madmin.KMSAPI{
		{Method: http.MethodGet, Path: "stub/path"},
	}, nil
}

// Status returns a set of endpoints and their KMS status.
func (s StubKMS) Status(context.Context) (map[string]madmin.ItemState, error) {

pkg testing, method (*B) Context() context.Context #36532
pkg testing, method (*F) Context() context.Context #36532
pkg testing, method (*T) Context() context.Context #36532

	Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (interface{}, error)
}

// JSONSerializer json serializer
type JSONSerializer struct{}

// Scan implements serializer interface
func (JSONSerializer) Scan(ctx context.Context, field *Field, dst reflect.Value, dbValue interface{}) (err error) {
	fieldValue := reflect.New(field.FieldType)

	if dbValue != nil {
		var bytes []byte

        return new DefaultEncryptInvokerRequest(
                context.parserRequest,
                context.cwd,
                context.installationDirectory,
                context.userHomeDirectory,
                context.userProperties,
                context.systemProperties,
                context.topDirectory,
                context.rootDirectory,

				apiErr := toAPIError(r.Context(), err)
				writeResponse(w, apiErr.HTTPStatusCode, nil, mimeNone)
			case http.MethodGet:
				writeErrorResponse(r.Context(), w, toAPIError(r.Context(), err), r.URL)
			}
			return
		}
	}

	if globalEtcdClient != nil {
		// Borrowed from
		// https://github.com/etcd-io/etcd/blob/main/etcdctl/ctlv3/command/ep_command.go#L118
		ctx, cancel := context.WithTimeout(r.Context(), defaultContextTimeout)