Constructor.
AbstractProxy|NativeSessionHandler|\SessionHandlerInterface|null $handler:
MetadataBag $metaBag MetadataBag:
Overrides NativeSessionStorage::__construct
public function __construct($handler = null, MetadataBag $metaBag = null) {
$this
->setMetadataBag($metaBag);
$this
->setSaveHandler($handler);
}