/**
* @return static
*/
public static function getInstance()
{
if (!self::$instance) {
self::$instance = new static();
}
return self::$instance;
}
/**
* @return Storage
*/
private final function getPostponeStorage()
{
if (!self::$postponeStorage) {
self::$postponeStorage = new Storage\Session();
}
return self::$postponeStorage;
}
