private function _sync()
{
$event = $this->_calendar->getEventById($this->_reservation->getIdGoogleEvent());
if ($event->getStatus() == self::EVENT_STATUS_CANCELLED) {
$this->_deleteLocal();
} else {
$localUpdateTime = $this->_reservation->getLastSaveTime();
$remoteUpdateTime = DateTime::create($event->getUpdated())->getTimestamp();
if ($localUpdateTime < $remoteUpdateTime) {
$this->_updateLocal($event);
} else {
$this->_updateRemote($event);
}
}
}
