public function getSignatureService($signatureServiceName)
 {
     return parent::getSignatureService($signatureServiceName);
 }
 public function testGetSignatureService()
 {
     $this->setExpectedException('Symfony\\Component\\HttpKernel\\Exception\\HttpException', 'signature_method_rejected');
     $this->oauthServerService->getSignatureService('FakeSignatureService');
 }