How to use the @material/list.strings.CHECKBOX_RADIO_SELECTOR function in @material/list

_handleClickEvent(evt: MouseEvent): void {
    const index = this._getListItemIndexByEvent(evt);
    const target = evt.target as HTMLElement;

    const listItem = this._getListItemByEventTarget(evt.target!);
    if (listItem && listItem.disabled) {
      return;
    }

    // Toggle the checkbox only if it's not the target of the event, or the checkbox will have 2 change events.
    const toggleCheckbox = !matches(target, strings.CHECKBOX_RADIO_SELECTOR);
    this._foundation.handleClick(index, toggleCheckbox);
  }