}\n\n      if (!treeviewMenu.is(SELECTOR_TREEVIEW_MENU)) {\n        return\n      }\n    }\n\n    event.preventDefault()\n\n    const parentLi = $relativeTarget.parents(SELECTOR_LI).first()\n    const isOpen = parentLi.hasClass(CLASS_NAME_OPEN)\n\n    if (isOpen) {\n      this.collapse($(treeviewMenu), parentLi)\n    } else {\n      this.expand($(treeviewMenu), parentLi)\n    }\n  }\n\n  // Private\n\n  _setupListeners() {\n    const elementId = this._element.attr('id') !== undefined ? `#${this._element.attr('id')}`...