_ loaditemset函数从项目集中加载值并应用编辑器，然后返回包含具有正确数据类型的项目的JSON对象。
The _loaditemset function loads values from the item set and applies the editors, and then returns a JSON object that contains the items with correct data types.
还可以在复合应用程序编辑器中打开单元测试，看看它们是如何装配的。
You can also open up the unit tests in the composite application editor to see how they were assembled.
不需要编写任何代码；相反，所有必要的组装和配置步骤都是在复合应用程序编辑器中完成的。
No single line of code needed to be written; instead all the necessary assembly and configuration steps could be undertaken in the composite application editor.
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