code: func (f *RemoteRuntime) PullImage(ctx context.Context, req *kubeapi.PullImageRequest) (*kubeapi.PullImageResponse, error) {
  	image, err := f.ImageService.PullImage(req.Image, req.Auth, req.SandboxConfig)
  	if err != nil {
  		return nil, err
  	}
  
  	return &kubeapi.PullImageResponse{
  		ImageRef: image,
  	}, nil
  }
docs: // PullImage pulls an image with authentication config.