protected function throwAPIException($result) {
    $e = new FacebookApiException($result);
    switch ($e->getType()) {
      // OAuth 2.0 Draft 00 style
      case 'OAuthException':
        // OAuth 2.0 Draft 10 style
      case 'invalid_token':
        // REST server errors are just Exceptions
      case 'Exception':
        $message = $e->getMessage();
        if ((strpos($message, 'Error validating access token') !== false) ||
            (strpos($message, 'Invalid OAuth access token') !== false) ||
            (strpos($message, 'An active access token must be used') !== false)
        ) {
          $this->destroySession();
        }
        break;
    }

    throw $e;
  }