Membrane.Log.Logger.shutdown

You're seeing just the function shutdown, go back to Membrane.Log.Logger module for more information.
Link to this function

shutdown(server, timeout \\ 5000)

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Specs

shutdown(pid(), timeout()) :: :ok

Stops given logger process.

It will wait for reply for amount of time passed as second argument (in milliseconds).

Will trigger calling handle_shutdown/2 logger callback.

Returns :ok.