async def get_sink_info(self):
        """Gets a reference to the default sink and triggers update for subscribed clients."""
        sinks = [
            sink for sink in await self.pulse.sink_list() if sink.name == self.default_sink_name
        ]
        if not sinks:
            logger.warning("Could not get info for default sink")
            self.default_sink = None
            return

        self.default_sink = sinks[0]
        self.update_clients()
Gets a reference to the default sink and triggers update for subscribed clients.
libqtile/widget/pulse_volume.py