Placeholder to check if player has pet in their inventory?

[catches]

For example, the current placeholder %mypet_has_pet% returns yes or no if they have a active pet, but is it also possible to add a placeholder that checks if a player has a pet at all? Like for example in their storage.

[Jakllp]

Should be easy enough to implement, slipped through the cracks

Edit: Turns out: Not that easy as it would need to handle funny async stuff