src/AvaTaxClient.php
/**
     * List all ISO 3166 countries
     *
     * Returns a list of all ISO 3166 country codes, and their US English friendly names.
     * This API is intended to be useful when presenting a dropdown box in your website to allow customers to select a country for 
     * a shipping address.
     *
     * 
     * @return FetchResult
     */
List all ISO 3166 countries
Returns a list of all ISO 3166 country codes, and their US English friendly names.
This API is intended to be useful when presenting a dropdown box in your website to allow customers to select a country for
a shipping address.


List all ISO 3166 countries Returns a list of all ISO 3166 country codes and their US English friendly names . This API is intended to be useful when presenting a dropdown box in your website to allow customers to select a country for a shipping address .
public function listCountries()
    {
        $path = "/api/v2/definitions/countries";
        $guzzleParams = [
            'query' => [],
            'body' => null
        ];
        return $this->restCall($path, 'GET', $guzzleParams);
    }
public function listCountries ( ) { $ path = " /api/v2/definitions/countries " ; $ guzzleParams = [ 'query' => [ ] , 'body' => null ] ; return $ this -> restCall ( $ path , 'GET' , $ guzzleParams ) ; }
List all ISO 3166 countries
 Returns a list of all ISO 3166 country codes, and their US English friendly names.
List all ISO 3166 countries Returns a list of all ISO 3166 country codes and their US English friendly names .