code: func (pc *PCCloud) GetZoneByProviderID(ctx context.Context, providerID string) (cloudprovider.Zone, error) {
  	return cloudprovider.Zone{}, errors.New("GetZoneByProviderID not implemented")
  }
docs: // GetZoneByProviderID implements Zones.GetZoneByProviderID
  // This is particularly useful in external cloud providers where the kubelet
  // does not initialize node data.