def stop(self, user):
        for agg in self.aggregates.all():
            agg.as_leaf_class().stop_slice(self)
        self.started = False
        self.save()
Indicate that a thread will start putting into this queue.
dataset/ETHPy150Open fp7-ofelia/ocf/expedient/src/python/expedient/clearinghouse/slice/models.py/Slice.stop--crossover with--dataset/ETHPy150Open beetbox/beets/beets/util/pipeline.py/CountedQueue.acquire