/**
* @param object $tpl template object to initialize if needed
* @return bool|null|T3Admin
*/
public static function getApp($tpl = null)
{
if (empty(self::$t3app)) {
$japp = JFactory::getApplication();
self::$t3app = $japp->isAdmin() ? self::getAdmin() : self::getSite($tpl);
}
return self::$t3app;
}