conditional mapping <expr> IronVisible() [...]

[thjbdvlt]

hello! thank you for this very cool plugin!!! it helps me A LOT :-)
i was wondering if there were any function similar to pumvisible() but for iron buffers ('is there any visible iron buffer') in order to make some conditional mappings (i didn't find any in the documentation nor any mention in github discussions).
thank's again. wishes you a pleasant beginning of winter