code: func SelectZoneForVolume(zoneParameterPresent, zonesParameterPresent bool, zoneParameter string, zonesParameter, zonesWithNodes sets.String, node *v1.Node, allowedTopologies []v1.TopologySelectorTerm, pvcName string) (string, error) {
  	zones, err := SelectZonesForVolume(zoneParameterPresent, zonesParameterPresent, zoneParameter, zonesParameter, zonesWithNodes, node, allowedTopologies, pvcName, 1)
  	if err != nil {
  		return "", err
  	}
  	zone, ok := zones.PopAny()
  	if !ok {
  		return "", fmt.Errorf("could not determine a zone to provision volume in")
  	}
  	return zone, nil
  }
docs: // SelectZoneForVolume is a wrapper around SelectZonesForVolume
  // to select a single zone for a volume based on parameters