虚包是包含一套方法的类，利用它，你可以从后台创建数据对象，或提供一些其它的业务功能。

The facade is a class that provides a set of methods that can create data objects from the back end, or provide some other business function.

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在每一个包中，我们最初的类图都来自于我们的用例、业务对象模型、注释和访谈。

Within each package, our initial class diagrams were derived from our use cases, business object model, notes, and interviews.

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首先，导入了一些业务对象；在这个示例中，这些对象在com . burgerdome . order包中。

First, some of the business objects are imported; in this case, those are in the com.burgerdome.order package.

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