type: object description: The details of outbound items. x-schemaName: AdminPostExchangesAddItemsReqSchema properties: items: type: array description: The details of outbound items. items: type: object description: An item's details. required: - variant_id - quantity properties: variant_id: type: string title: variant_id description: The ID of the associated product variant. quantity: type: number title: quantity description: The item's quantity. unit_price: type: number title: unit_price description: The item's unit price. internal_note: type: string title: internal_note description: A note viewed only by admin users. allow_backorder: type: boolean title: allow_backorder description: Whether the item can be added even if it's not in stock. metadata: type: object description: The item's metadata, can hold custom key-value pairs.