def joined
import bendvy-ecs-core@0.1.0.4/owned_event_family_catalog.bend as OwnedEventFamilyCatalogimport Base
import bendvy-ecs-core@0.1.0.4/owner_product.bend as Product
13def joined(~LA:Type,~LB:Type,~RA:Type,~RB:Type,first:LA & RA,second:LB & RB) -> Product.Owner<LA,LB> & Product.Owner<RA,RB>:
14 (first,receiptA)=first
15 (second,receiptB)=second
16 (Product.Owner{first,second},Product.Owner{receiptA,receiptB})