How to use the @shopgate/engage/core.UIEvents.addListener function in @shopgate/engage

constructor(props) {
    super(props);

    UIEvents.addListener(NavDrawer.EVENT_CLOSE, this.setFocus);
  }

componentWillUnmount() {
    UIEvents.addListener(NavDrawer.EVENT_CLOSE, this.setFocus);
  }

componentDidMount() {
    UIEvents.addListener(MODAL_EVENTS.SHOW, this.handleModalShow);
    UIEvents.addListener(MODAL_EVENTS.HIDE, this.handleModalHide);
  }

componentDidMount() {
    UIEvents.addListener(MODAL_EVENTS.SHOW, this.handleModalShow);
    UIEvents.addListener(MODAL_EVENTS.HIDE, this.handleModalHide);
  }