this._addAriaAndCollapsedClass(\n        Collapse._getTargetFromElement(element),\n        [element]\n      )\n    })\n\n    return parent\n  }\n\n  _addAriaAndCollapsedClass(element, triggerArray) {\n    const isOpen = $(element).hasClass(CLASS_NAME_SHOW)\n\n    if (triggerArray.length) {\n      $(triggerArray)\n        .toggleClass(CLASS_NAME_COLLAPSED, !isOpen)\n        .attr('aria-expanded', isOpen)\n    }\n  }\n\n  // Static\n  static _getTargetFromElement(element) {\n    const selector =...