Handle User Mention from News Feed

It's possible to receive user mention from anyone

session.getNotification().addNotificationListener(new AbstractNotificationCallback() {
  @Override
  public void onMention(@NotNull Feed feed) {
    // new mention callback
  }
});
session.websocket.onMention((feed: Feed) => {
    
});
session.websocket.onMention((feed) => {
    
});