public IOSBillingInitChecker(BilliginitListner listner)
    {
        _listner = listner;

        if(IOSInAppPurchaseManager.instance.IsStoreLoaded) {
            _listner();
        } else {

            IOSInAppPurchaseManager.instance.addEventListener(IOSInAppPurchaseManager.STORE_KIT_INITIALIZED, OnStoreKitInit);
            if(!IOSInAppPurchaseManager.instance.IsWaitingLoadResult) {
                IOSInAppPurchaseManager.instance.loadStore();
            }
        }
    }
    public IOSBillingInitChecker(BilliginitListner listner)
    {
        _listner = listner;

        if (IOSInAppPurchaseManager.instance.IsStoreLoaded)
        {
            _listner();
        }
        else
        {
            IOSInAppPurchaseManager.instance.addEventListener(IOSInAppPurchaseManager.STORE_KIT_INITIALIZED, OnStoreKitInit);
            if (!IOSInAppPurchaseManager.instance.IsWaitingLoadResult)
            {
                IOSInAppPurchaseManager.instance.loadStore();
            }
        }
    }