def peek(self):
        return self._queue[0][0]
Make sure the slug is unique.
dataset/ETHPy150Open flaviogrossi/sockjs-cyclone/sockjs/cyclone/utils.py/PriorityQueue.peek--crossover with--dataset/ETHPy150Open magopian/django-data-exports/data_exports/tests.py/ExportTest.test_slug