Optional ReadonlyisAppears in response to Get ShippingMethods for a Cart if the shipping rate matches the search query.
ReadonlypriceFixed shipping rate for the selected classification.
ReadonlytypeReadonlyvaluekey selected from the values of the CartClassificationType configured in the Project.
The ShippingRate maps to an abstract Cart categorization expressed by strings (for example,
Light,Medium, orHeavy).