code: func (az *Cloud) deleteRouteWithRetry(routeName string) error {
  	return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
  		ctx, cancel := getContextWithCancel()
  		defer cancel()
  
  		resp, err := az.RoutesClient.Delete(ctx, az.RouteTableResourceGroup, az.RouteTableName, routeName)
  		klog.V(10).Infof("RoutesClient.Delete(%s,%s): end", az.RouteTableName, routeName)
  		return az.processHTTPRetryResponse(nil, "", resp, err)
  	})
  }
docs: // deleteRouteWithRetry invokes az.RoutesClient.Delete with exponential backoff retry