Get a error when i call `MXMetricManager.finishExtendedLaunchMeasurement`

when call MXMetricManager.finishExtendedLaunchMeasurement , i get a error:

how to solve it please?

This seems to be tightly bound to MetricKit itself, rather than the Swift language, and so I recommend that you start a thread over on Apple Developer Forums. Please tag it with MetricKit so that I see it.

Also, it’d be helpful if you include the message as text rather than a screen shot. For this and other hints, see my Quinn’s Top Ten DevForums Tips post.

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Quinn “The Eskimo!” @ DTS @ Apple

thanks a lot