code: func NewClient(sockPath string) (clitypes.ContainerizedClient, error) {
  	if sockPath == "" {
  		sockPath = containerdSockPath
  	}
  	cclient, err := containerd.New(sockPath)
  	if err != nil {
  		return nil, err
  	}
  	return &baseClient{
  		cclient: cclient,
  	}, nil
  }
docs: // NewClient returns a new containerizedengine client
  // This client can be used to manage the lifecycle of
  // dockerd running as a container on containerd.