public function sendData($data)
 {
     $arraydados = array("chave" => $this->getApiKey(), "referencia" => $this->getTransactionReference());
     $url = $this->getUrl();
     try {
         $client = new \SoapClient($url, array('cache_wsdl' => WSDL_CACHE_NONE));
         $result = $client->informacaoReferencia($arraydados);
     } catch (SoapFault $sf) {
         throw new \Exception($sf->getMessage(), $sf->getCode());
     }
     return $this->response = new checkStatusResponse($this, $result);
 }