code: func (az *Cloud) getFrontendIPConfigID(lbName, fipConfigName string) string {
  	return fmt.Sprintf(
  		frontendIPConfigIDTemplate,
  		az.SubscriptionID,
  		az.ResourceGroup,
  		lbName,
  		fipConfigName)
  }
docs: // returns the full identifier of a loadbalancer frontendipconfiguration.