code: func (api *API) ModifyLoadBalancer(zoneID string, lb LoadBalancer) (LoadBalancer, error) {
  	uri := "/zones/" + zoneID + "/load_balancers/" + lb.ID
  	res, err := api.makeRequest("PUT", uri, lb)
  	if err != nil {
  		return LoadBalancer{}, errors.Wrap(err, errMakeRequestError)
  	}
  	var r loadBalancerResponse
  	if err := json.Unmarshal(res, &r); err != nil {
  		return LoadBalancer{}, errors.Wrap(err, errUnmarshalError)
  	}
  	return r.Result, nil
  }
docs: // ModifyLoadBalancer modifies a configured load balancer.
  //
  // API reference: https://api.cloudflare.com/#load-balancers-modify-a-load-balancer