This is still not possible with the built-in functionality of the control. Did you try to use the SlotSelectionBehavior
Please refer to our documentation for more details about it:
A simple demo how you can use it to change the slot's resources you can find below:
CustomSlotSelectionBehavior : SlotSelectionBehavior
Slot old =
Slot GetSelectionOverride(SlotSelectionState state, Slot currentSlot)
//add here all resources that you need
old = currentSlot;
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