r(element)\n\n      if (selected) {\n        this._addAriaAndCollapsedClass([element], this._isShown(selected))\n      }\n    }\n  }\n\n  _getFirstLevelChildren(selector) {\n    const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent)\n    // remove children if greater depth\n    return SelectorEngine.find(selector, this._config.parent).filter(element => !children.includes(element))\n  }\n\n  _addAriaAndCollapsedClass(triggerArray, isOpen) {\n    if (!triggerArray.length)...

ata-parent=\"${this._config.parent}\"]`\n    const children = [].slice.call(parent.querySelectorAll(selector))\n\n    $(children).each((i, element) => {\n      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,...