function testNoInResponseTo()
 {
     $doc = new \DOMDocument();
     $doc->load(__DIR__ . '/../../../../../../../resources/sample/Response/response02.xml');
     $response = new Response();
     $response->loadFromXml($doc->firstChild);
     $this->assertNull($response->getInResponseTo());
 }
 protected function validateResponseSignature(ServiceInfo $serviceInfo, Response $response)
 {
     /** @var  $signature SignatureXmlValidator */
     if ($signature = $response->getSignature()) {
         $keys = $this->getAllKeys($serviceInfo);
         $signature->validateMulti($keys);
     }
 }