Use this call to retrieve the contents of a fulfillment based on its unique identifier, fulfillmentId (combined with the associated order's orderId). The fulfillmentId value was originally generated by the createShippingFulfillment call, and is returned by the getShippingFulfillments call in the members.fulfillmentId field.
The unique identifier of the fulfillment. This eBay-generated value was created by the Create Shipping Fulfillment call, and returned by the getShippingFulfillments call in the fulfillments.fulfillmentId field; for example, 9405509699937003457459.
The globally unique eBay-generated identifier of the line item.
Note: A single line item can consist of multiple units of a purchased item, and one unit can consist of multiple parts or components. Although these components might be provided by the manufacturer in separate packaging, the seller cannot distribute them among multiple shipping packages. Thus, each line item ID will appear in exactly one fulfillment.