public function init() {
        add_action('usces_action_lastprocessing', [$this, 'unsetSessionVars']);
        add_action('usces_main', [$this, 'swapSession']);
        add_action('usces_action_after_inCart', [$this, 'saveGroupAndItemLabelsInGroupItemsCart'], 10, 1);
        add_filter('usces_filter_up_serialize', [$this, 'filterComboSetUpSerialize'], 10, 2);
        add_filter('usces_filter_realprice', [$this, 'filterComboSetRealPrice'], 10, 2);
    }