如果该字符完成了一个函数，编辑器允许函数折叠以最小化文本空间。

If the character completes a function, the editor enables subroutine folding to minimize the text space.

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例如，Structure Browser就是一个有用的插件，它用一个可折叠的树来显示函数、类和方法，这样就可以浏览或显示一个大模块中的上下文。

For example, a handy plugin is the Structure Browser, which shows a collapsible tree of functions, classes, and methods that can be used to navigate or show context within a large module.

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SelectionListener 实现的构造函数接受一个布尔变量，该变量定义要展开还是折叠树项目，具体取决于选中了哪个按钮。

The constructor for the SelectionListener implementation accepts a Boolean variable that defines whether the tree items are to be expanded or collapsed, depending on which button is selected.

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