serializeBilling() private method

private serializeBilling ( ) : array
return array
 /**
  * @return array
  */
 protected function serializeBilling()
 {
     /** @var $billing  \Payu\Component\Billing */
     $billing = $this->request->getBilling();
     if (!$billing) {
         return array();
     }
     return parent::serializeBilling();
 }