class SessionBagProxy

final class SessionBagProxy implements SessionBagInterface {
    private array $data;
    private ?int $usageIndex;
    private ?\Closure $usageReporter;
    public function __construct(SessionBagInterface $bag, array &$data, ?int &$usageIndex, ?callable $usageReporter) {
        $this->bag = $bag;
        $this->data =& $data;
        $this->usageIndex =& $usageIndex;
        $this->usageReporter = null === $usageReporter ? null : $usageReporter(...);
    }
    public function getBag() : SessionBagInterface {
        ++$this->usageIndex;
        if ($this->usageReporter && 0 <= $this->usageIndex) {
            ($this->usageReporter)();
        }
        return $this->bag;
    }
    public function isEmpty() : bool {
        if (!isset($this->data[$this->bag
            ->getStorageKey()])) {
            return true;
        }
        ++$this->usageIndex;
        if ($this->usageReporter && 0 <= $this->usageIndex) {
            ($this->usageReporter)();
        }
        return empty($this->data[$this->bag
            ->getStorageKey()]);
    }
    public function getName() : string {
        return $this->bag
            ->getName();
    }
    public function initialize(array &$array) : void {
        ++$this->usageIndex;
        if ($this->usageReporter && 0 <= $this->usageIndex) {
            ($this->usageReporter)();
        }
        $this->data[$this->bag
            ->getStorageKey()] =& $array;
        $this->bag
            ->initialize($array);
    }
    public function getStorageKey() : string {
        return $this->bag
            ->getStorageKey();
    }
    public function clear() : mixed {
        return $this->bag
            ->clear();
    }

}