The following code example can be used in a document-level customization.
下面的代码示例可用于文档级自定义项。
Contains all of the data that is cached in the data island of a document-level customization.
包含在文档级自定义项的数据岛中缓存的所有数据。
If the code is tightly integrated with a single document, create a document-level customization.
如果代码与单个文档紧密集成，则应创建文档级自定义项。
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