code: func (az *Cloud) deletePublicIPWithRetry(service *v1.Service, pipResourceGroup string, pipName string) error {
  	return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
  		ctx, cancel := getContextWithCancel()
  		defer cancel()
  
  		resp, err := az.PublicIPAddressesClient.Delete(ctx, pipResourceGroup, pipName)
  		return az.processHTTPRetryResponse(service, "DeletePublicIPAddress", resp, err)
  	})
  }
docs: // deletePublicIPWithRetry invokes az.PublicIPAddressesClient.Delete with exponential backoff retry