code: func (os *OpenStack) GetZone(ctx context.Context) (cloudprovider.Zone, error) {
  	md, err := getMetadata(os.metadataOpts.SearchOrder)
  	if err != nil {
  		return cloudprovider.Zone{}, err
  	}
  
  	zone := cloudprovider.Zone{
  		FailureDomain: md.AvailabilityZone,
  		Region:        os.region,
  	}
  	klog.V(4).Infof("Current zone is %v", zone)
  	return zone, nil
  }
docs: // GetZone returns the current zone