$(this._element)\n      .one(Util.TRANSITION_END, complete)\n      .emulateTransitionEnd(transitionDuration)\n  }\n\n  setTransitioning(isTransitioning) {\n    this._isTransitioning = isTransitioning\n  }\n\n  dispose() {\n    $.removeData(this._element, DATA_KEY)\n\n    this._config = null\n    this._parent = null\n    this._element = null\n    this._triggerArray = null\n    this._isTransitioning = null\n  }\n\n  // Private\n  _getConfig(config) {\n    config = {\n      ...Default,\n      ...config\n    }\n    config.toggle...

this._element.classList.remove(CLASS_NAME_COLLAPSE)\n    this._element.classList.add(CLASS_NAME_COLLAPSING)\n\n    this._element.style[dimension] = 0\n\n    this._addAriaAndCollapsedClass(this._triggerArray, true)\n    this._isTransitioning = true\n\n    const complete = () => {\n      this._isTransitioning = false\n\n      this._element.classList.remove(CLASS_NAME_COLLAPSING)\n      this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW)\n\n      this._element.style[dimension] = ''\n\n      EventHand...