Defines the allowed values for a search key.
@:value(cast "country_code")@:impl@:enuminlineread onlyCountryCode:SearchKey = "country_code"
@:value(cast "order_numbers")@:impl@:enuminlineread onlyDellOrderNumbers:SearchKey = "order_numbers"
@:value(cast "dp_ids")@:impl@:enuminlineread onlyDellPurchaseIds:SearchKey = "dp_ids"
@:value(cast "po_numbers")@:impl@:enuminlineread onlyPurchaseOrderNumbers:SearchKey = "po_numbers"