protected function get($path, array $parameters = array(), $requestHeaders = array())
    {
        if (array_key_exists('ref', $parameters) && is_null($parameters['ref'])) {
            unset($parameters['ref']);
        }
        $response = $this->client->getHttpClient()->get($path, $parameters, $requestHeaders);

        return ResponseMediator::getContent($response);
    }