unsubscribes

After the first subscriber subscribes, when messages are published to the topic, the publication point adds the messages to the topic space until the last subscriber unsubscribes.

第一个订户订阅后，发布点会在消息发布到主题时将其添加到主题空间，直到最后一个订户取消订阅为止。

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Unsubscribes a gadget from a channel.

取消订阅到信道的gadget。

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When the manager instance shuts down, it unsubscribes from the DataPower devices.

管理程序实例关闭时，它取消DataPower设备订阅。

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It then asynchronously receives a notification when the presentity changes its status, and unsubscribes to a presentity.

随后当在线状态实体更改其状态时它将以异步方式接收通知，还能够向在线状态实体取消订阅。

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