code: func (api *API) ArgoSmartRouting(zoneID string) (ArgoFeatureSetting, error) {
  	uri := "/zones/" + zoneID + "/argo/smart_routing"
  
  	res, err := api.makeRequest("GET", uri, nil)
  	if err != nil {
  		return ArgoFeatureSetting{}, errors.Wrap(err, errMakeRequestError)
  	}
  
  	var argoDetailsResponse ArgoDetailsResponse
  	err = json.Unmarshal(res, &argoDetailsResponse)
  	if err != nil {
  		return ArgoFeatureSetting{}, errors.Wrap(err, errUnmarshalError)
  	}
  	return argoDetailsResponse.Result, nil
  }
docs: // ArgoSmartRouting returns the current settings for smart routing.
  //
  // API reference: https://api.cloudflare.com/#argo-smart-routing-get-argo-smart-routing-setting