src/AvaTaxClient.php
/**
     * List all ISO 3166 regions
     *
     * Returns a list of all ISO 3166 region 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 region 
     * within the country for a shipping addresses.
     *
     * 
     * @return FetchResult
     */
List all ISO 3166 regions
Returns a list of all ISO 3166 region 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 region
within the country for a shipping addresses.


List all ISO 3166 regions Returns a list of all ISO 3166 region 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 region within the country for a shipping addresses .
public function listRegions()
    {
        $path = "/api/v2/definitions/regions";
        $guzzleParams = [
            'query' => [],
            'body' => null
        ];
        return $this->restCall($path, 'GET', $guzzleParams);
    }
public function listRegions ( ) { $ path = " /api/v2/definitions/regions " ; $ guzzleParams = [ 'query' => [ ] , 'body' => null ] ; return $ this -> restCall ( $ path , 'GET' , $ guzzleParams ) ; }
List all ISO 3166 regions
 Returns a list of all ISO 3166 region codes and their US English friendly names.
List all ISO 3166 regions Returns a list of all ISO 3166 region codes and their US English friendly names .