this._setupListeners()\n  }\n\n  expand(treeviewMenu, parentLi) {\n    const expandedEvent = $.Event(EVENT_EXPANDED)\n\n    if (this._config.accordion) {\n      const openMenuLi = parentLi.siblings(SELECTOR_OPEN).first()\n      const openTreeview = openMenuLi.find(SELECTOR_TREEVIEW_MENU).first()\n      this.collapse(openTreeview, openMenuLi)\n    }\n\n    parentLi.addClass(CLASS_NAME_IS_OPENING)\n    treeviewMenu.stop().slideDown(this._config.animationSpeed, () => {\n      parentLi.addClass(CLASS_NAME_OPEN)\n...