How can a RadiusGive receiver know who gave them the item? (setting master)

[Elpoder_36]

Hi everyone. I'm trying to achieve the following in ZScript (GZDoom version 4.14.1):

When an actor (A) uses A_RadiusGive to give an item (CustomInventory, Inventory, or any viable solution) to nearby actors (B), I need each receiver (B) to know who gave them the item and set that actor as their master.

Things I've tried so far:

I created a class derived from CustomInventory and tried to override bool Use(Inventory owner), but it throws this error:
Attempt to override non-existent virtual function Use

I also tried TryPickup, but that gave:
Attempt to override non-existent virtual function TryPickup

I attempted a workaround using a custom Actor token that stores the giver and performs A_RadiusGive, but the receiving actor has no reliable way of knowing who the giver was—unless I rely on a static field, which doesn't work properly with multiple simultaneous instances.

What I specifically want is:

When the actor receives the item, to be able to do something like self.master = whoever_gave_me_this

It must support multiple givers acting at the same time (no global/static variables)

It shouldn't depend on overriding functions like Use or TryPickup if they're not virtual anymore

Ideally usable from Decorate with A_RadiusGive, but if needed, I can call from ZScript too

Is there a canonical or reliable way to do this in modern ZScript (GZDoom 4.14.1)?
Any insight, workaround, or example would be greatly appreciated!

Thanks in advance!