Davibannun-laravel-track

I have set up APN in laravel using https://github.com/davibennun/laravel-push-notification and it works fine when sending push notifications to devices.

And now I can't track if any push notification has been triggered (since this davibennun library can send a push notification to multiple device tokens and if one of them doesn't work, the rest of the notification is not sent).

I did to search his github and ask questions, but I don't understand any clues?

Thanks in advance.

EDIT: Since davibennun has combined a pull request from canfiax about a new "getFeedback ()" method to get feedback from every push notification that has already been sent.

Here are the following problems and ways to use the method.
# 22 issue
how to use getFeedback ()