/**
  * @param array|\stdClass $payload
  * @param null $responseCode
  */
 public function __construct($payload, $responseCode)
 {
     parent::__construct($payload);
     if (is_string($responseCode)) {
         $responseCode = (int) substr($responseCode, 0, 3);
     }
     $this->responseCode = $responseCode;
 }