inspiran/VespolinaInventoryBundle — comment on commit 36f5e35df25fb948fe6fb50752a0530d45af9320
File: Model/InventoryInterface.php line 18
By IamPersistent:

should it be Sku? Would it be better to move the IdentifierSet (and Identifiers) from Product to a core bundle and use that instead? That way you can have a different identifier or several different idenifiers