return nil, nil
}

func (fk *fakeKubelet) ListPodSandboxMetrics(ctx context.Context) ([]*runtimeapi.PodSandboxMetrics, error) {
	return nil, nil
}

type fakeRuntime struct {
	execFunc        func(string, []string, io.Reader, io.WriteCloser, io.WriteCloser, bool, <-chan remotecommand.TerminalSize) error
	attachFunc      func(string, io.Reader, io.WriteCloser, io.WriteCloser, bool, <-chan remotecommand.TerminalSize) error

	// We use two maps, one for parsing and one for execution.
	// This separation makes the API cleaner since it doesn't
	// expose reflection to the client.
	muFuncs    sync.RWMutex // protects parseFuncs and execFuncs
	parseFuncs FuncMap
	execFuncs  map[string]reflect.Value
}

// Template is the representation of a parsed template. The *parse.Tree
// field is exported only for use by [html/template] and should be treated

	recordError(operation, err)
	return err
}

func (in instrumentedRuntimeService) ExecSync(ctx context.Context, containerID string, cmd []string, timeout time.Duration) ([]byte, []byte, error) {
	const operation = "exec_sync"
	defer recordOperation(operation, time.Now())

	stdout, stderr, err := in.service.ExecSync(ctx, containerID, cmd, timeout)
	recordError(operation, err)
	return stdout, stderr, err
}

func findFunction(name string, tmpl *Template) (v reflect.Value, isBuiltin, ok bool) {
	if tmpl != nil && tmpl.common != nil {
		tmpl.muFuncs.RLock()
		defer tmpl.muFuncs.RUnlock()
		if fn := tmpl.execFuncs[name]; fn.IsValid() {
			return fn, false, true
		}
	}
	if fn := builtinFuncs()[name]; fn.IsValid() {
		return fn, true, true
	}
	return reflect.Value{}, false, false
}

func (m *kubeGenericRuntimeManager) RunInContainer(ctx context.Context, id kubecontainer.ContainerID, cmd []string, timeout time.Duration) ([]byte, error) {
	stdout, stderr, err := m.runtimeService.ExecSync(ctx, id.ID, cmd, timeout)
	// NOTE(tallclair): This does not correctly interleave stdout & stderr, but should be sufficient
	// for logging purposes. A combined output option will need to be added to the ExecSyncRequest