Adding preference option to existing driver/app

You wouldn't happen to know if there's a proper way to get the current hub-wide setting for default TTS voice via code, while I have you here?

Asked in this post: Getting current default TTS voice

I have a hack that works, but it's a total hack.

The "Speak" command that's auto-added via the SpeechSynthesis capability seems to have a way to get the default, so it must exist, but I didn't see it documented anywhere.