RDF.BlankNode.Generator.stop

You're seeing just the function stop, go back to RDF.BlankNode.Generator module for more information.
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stop(pid, reason \\ :normal, timeout \\ :infinity)

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Synchronously stops the blank node generator with the given reason.

It returns :ok if the agent terminates with the given reason. If the agent terminates with another reason, the call will exit.

This function keeps OTP semantics regarding error reporting. If the reason is any other than :normal, :shutdown or {:shutdown, _}, an error report will be logged.