What does this use of まいな mean?


[![enter image description
here](https://i.stack.imgur.com/PqH8S.png)](https://i.stack.imgur.com/PqH8S.png)

忘れちゃおるまいな

From context he seems to be asking "You didn't forget how much I apologize to
the dude"? But I'm not sure about this specific use.




な is the particle for inviting confirmation; ～まい is a borrowing from literary
Japanese that has the force of ～ないだろう, so here おるまい is formally equivalent to
おらないだろう. This latter form may not be used but the sense is clear.

