Your custom extension will be available for selection from the Configuration UI (user interface), as Figure 4 shows.
您的自定义扩展将可以用于从Configuration UI(用户接口)中进行选择，如图4中所示。
The user interface (UI), business logic, and configuration, or lack thereof, are mixed together with no thought to maintaining or extending the page with new features.
用户界面(UI)、业务逻辑和配置，或缺少其中一些元素，将它们混合在一起，而不考虑维护或扩展具有新功能的页面。
Most configuration options are never changed by users, so there's no point in cluttering up the UI with that kind of junk.
大多数配置选项从来不被用户更改，所以用这种意义不大的东西使UI混乱是不明智的。
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