它包括添加和删除书签、检索用户书签列表和检索（或者重命名）用户标记的方法。

It includes methods to add and delete bookmarks, retrieve a user's bookmark list, and retrieve (or rename) a user's tags.

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添加和删除联系人以测试应用程序。

Add and remove contacts to test your application.

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这些函数允许从页面元素添加和删除类。

These functions allow you to add and remove classes from page elements.

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