UFUNCTION reference parameters

Development Programming & Scripting
1

I want to make an interface with a function:

  UFUNCTION(BlueprintImplementableEvent, Category = "IConditionUser") void BP_GetConditions(TArray<FName> &ListenerConditions, TArray<FName> &UpdaterConditions);

There is an object that iterates over every object with the interface and collects data into two arrays that are passed. The problem is that when I implement this function in Blueprints I get the following:

114055-ufunc_ref.png
114055-ufunc_ref.png789×313 18.4 KB

Parameters passed by reference are only seen in Return Node, but not in the input node. How can I pass a reference to an array and modify it inside the BlueprintImplementableEvent?