提供了用于实现服务的惰性加载的工具。
Provides the facility to implement lazy loading of services.
值得一提的是在这个实例中使用了一个惰性加载模型。
It's worth noting that in this instance a lazy loading model is being used.
惰性加载意味着只有用户目前正在导航的目录被返回。
Lazy loading means only the directory the user is currently navigating is returned.
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