How to retrieve parent span instance from active span object

[Apokalypt]

Hi

I would like to know if there is a way to retrieve the parent span instance of the current active span ?

Context

I'm using opentelemetry with winston to save logs and traces in an app insights. We have implemented a sampling strategy in which we are keeping only 1% of logs/traces (it's more complicated but let's simplify like this)
In case of service crash I would like to be able to force the sampling of the active span AND the parent spans. For that, I am catching unhandledRejection and uncaughtException to set the traceFlags to 1 on the active span. But I never found how to apply the same rule over the parent spans. Is there any way to perform this kind of things ?

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