public function checkTokensFromStart(\Gems_Tracker_RespondentTrack $respTrack, $userId)
    {
        $token = $respTrack->getFirstToken();
        if ($token instanceof \Gems_Tracker_Token) {
            return $this->checkTokensFrom($respTrack, $respTrack->getFirstToken(), $userId);
        } else {
            return 0;
        }
    }