code: func (c *Cloud) GetVolumeLabels(volumeName KubernetesVolumeID) (map[string]string, error) {
  	awsDisk, err := newAWSDisk(c, volumeName)
  	if err != nil {
  		return nil, err
  	}
  	info, err := awsDisk.describeVolume()
  	if err != nil {
  		return nil, err
  	}
  	labels := make(map[string]string)
  	az := aws.StringValue(info.AvailabilityZone)
  	if az == "" {
  		return nil, fmt.Errorf("volume did not have AZ information: %q", *info.VolumeId)
  	}
  
  	labels[apis.LabelZoneFailureDomain] = az
  	region, err := azToRegion(az)
  	if err != nil {
  		return nil, err
  	}
  	labels[apis.LabelZoneRegion] = region
  
  	return labels, nil
  }
docs: // GetVolumeLabels implements Volumes.GetVolumeLabels