/**
  * Performs the real http request.
  *
  * @param  \OpenStackStorage\Client $client
  * @param  string                   $method
  * @param  string                   $path
  * @param  array                    $parameters
  * @param  array                    $headers
  * @return array
  * @throws \Exception
  */
 protected function makeRealRequest(Client $client, $method, $path, $parameters = array(), array $headers = array())
 {
     $headers['X-Auth-Token'] = $this->authToken;
     return $client->sendRequest($path, $method, $parameters, $headers);
 }