CloseIcion not working

[yusuf987]

version used : "rc-notification": "3.3.0",

i am trying to use my own close icon but its not working i have tried with svg also

 Notification.newInstance({}, notification => {
      notification.notice({
        content: 'content',
        closable: true,
        duration: 50,
        closeIcon: <div>X</div>
      });
    });