这种方法的一个抽象是:使用闭包,不需要开发访问者类的层次结构。
One attraction of this approach is that with closures you do not need to develop the visitor class hierarchy.
对主题访问的控制将通常由发布引擎基于主题层次结构中的访问控制列表进行管理。
Control over access to topics will normally be managed by the publication engine based on access control lists on a topic hierarchy.
您已经了解了如何使用框架来生成关于组件层次结构的可访问状态的报告。
You've learned how to use the framework to generate reports on the accessible status of a component hierarchy.
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