模块化模式：分离界面和插件、服务定位、事件聚合、外观模式。

Modularity patterns: Separated Interface and Plug In, Service Locator, Event Aggregator, facade.

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AggregationFactory是此插件的主要入口点，负责注册可用的聚合类型，并在运行时创建这些聚合的实例。

The AggregationFactory is the main point of entry for this plug-in, and it is responsible for registering the types of aggregations available and creating instances of those aggregations at runtime.

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