def METHOD_NAME(self):
    while not self._stop_event.is_set():
        queue_sizes = [
            (name, thread.queue.qsize(), thread.current_callback)
            for name, thread in sorted(self._threads.items())
        ]
        status = [
            "{name}={qsize} ({cb})".format(name=name, qsize=qsize, cb=cb)
            for name, qsize, cb in queue_sizes
            if qsize
        ]
        if status:
            debug_monitor_log.debug(" / ".join(status))
        # Else, all EventDispatch queues are empty.
        time.sleep(self.debug_monitor_interval)