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    MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription

    (mongodb >=1.13.0)

    MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription — Returns the previous description for the topology

    说明

    final public MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription(): MongoDB\Driver\TopologyDescription

    参数

    此函数没有参数。

    返回值

    Returns the previous MongoDB\Driver\TopologyDescription for the topology.

    错误／异常

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