Omnipay\Common\CreditCard::setShippingPhoneExtension PHP Метод

    public function setShippingPhoneExtension($value)
    {
        return $this->setParameter('shippingPhoneExtension', $value);
    }

 public function testShippingPhoneExtension()
 {
     $this->card->setShippingPhoneExtension('001');
     $this->assertEquals('001', $this->card->getShippingPhoneExtension());
 }