When I call `GET` on `/modifier_groups`, the only way I know how to get the relationship between the modifier groups and their items is through `/modifier_groups?expand=items`.
This gives me what I need, but a lot more so -- the expanded items relationship contains a lot of information on the items, which makes it slightly slower and consumes more memory.
Is there a way to retrieve just the item IDs associated with the modifier groups? I expect that providing that data instead of the entire expansion would also be easier on Clover's database servers.
