closed invoice
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以上为机器翻译结果,长、整句建议使用 人工翻译 。
And this implementation is closed: After you compile the FulfillmentGenerator class, you can't extend the invoice method to new types without editing the source code and recompiling.
此实现是封闭的:在您编译FulfillmentGenerator类以后,在不编辑源代码和重新编译的情况下,您无法将invoice方法扩展到新的类型。
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