where are the Listeners?

Hi 

Someone can tell me where the Someone can tell me; where the listeners of the events are; for example InvoiceCreated, invoicePrinting? I have already reviewed the Listeners and Observers folder and can not find the handlers of these events by any means.

Thanks

There is no such a listener but you can add your own through modules.

And

Look a t file  Jobs/Incomes/CreateInvoice.php

This line of code in jobs folder; invokes at event   InvoiceCreated

In line 112.  Who handles this one?

        event(new InvoiceCreated($invoice));