code: func (r Account) GetLargestAllowedSubnetCidr(numberOfHosts *int, locationId *int) (resp int, err error) {
  	params := []interface{}{
  		numberOfHosts,
  		locationId,
  	}
  	err = r.Session.DoRequest("SoftLayer_Account", "getLargestAllowedSubnetCidr", params, &r.Options, &resp)
  	return
  }
docs: // Computes the number of available public secondary IP addresses, aligned to a subnet size.