The interface has a single one-way method called event_emission with a single parameter with a type of connector.
此接口只有一个单向方法，名为 event_emission，此方法只有一个参数，其类型为connector。
The interface has a single one-way method called event_emission with a single parameter with a type of connector.
此接口只有一个单向方法，名为 event_emission，此方法只有一个参数，其类型为connector。
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