this._config.parent\n          }\n\n          return elem.classList.contains(CLASS_NAME_COLLAPSE)\n        })\n\n      if (actives.length === 0) {\n        actives = null\n      }\n    }\n\n    if (actives) {\n      activesData = $(actives).not(this._selector).data(DATA_KEY)\n      if (activesData && activesData._isTransitioning) {\n        return\n      }\n    }\n\n    const startEvent = $.Event(EVENT_SHOW)\n    $(this._element).trigger(startEvent)\n    if (startEvent.isDefaultPrevented()) {\n      return\n  ...

	if err != nil {
		return nil, err
	}

	for _, l := range listeners.DynamicListeners {
		if l.ActiveState == nil {
			continue
		}
		// Support v2 or v3 in config dump. See ads.go:RequestedTypes for more info.
		l.ActiveState.Listener.TypeUrl = v3.ListenerType
		listenerTyped := &listener.Listener{}
		err = l.ActiveState.Listener.UnmarshalTo(listenerTyped)
		if err != nil {
			return nil, err
		}