如何使用StringCustomFieldRef值的列表名称而不是internalID调用NetSuite SuiteTalk inventoryitem add？

StringCustomFieldRef customFieldRef = new StringCustomFieldRef();
customFieldRef.setScriptId("custitem_customfield"); // 自定义字段的scriptId
customFieldRef.setValue("列表名称"); // 列表的名称

InventoryItem inventoryItem = new InventoryItem();
inventoryItem.setExternalId("外部ID"); // 设置外部ID
inventoryItem.setItemId("物品ID"); // 设置物品ID
// 设置其他inventoryitem的属性

// 创建customFieldList并将StringCustomFieldRef对象添加到其中
CustomFieldList customFieldList = new CustomFieldList();
customFieldList.getCustomField().add(customFieldRef);
inventoryItem.setCustomFieldList(customFieldList);

AddRequest addRequest = new AddRequest();
addRequest.setRecord(inventoryItem);

AddResponse addResponse = port.add(addRequest);