code: func VerifyCgroupDriver(config *config.Config) error {
  	cd := getCD(config)
  	if cd == "" || cd == cgroupFsDriver || cd == cgroupSystemdDriver {
  		return nil
  	}
  	return fmt.Errorf("native.cgroupdriver option %s not supported", cd)
  }
docs: // VerifyCgroupDriver validates native.cgroupdriver