def to_json(self):
    raise NotImplementedError()
Begin logging.
dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/src/mapreduce/datastore_range_iterators.py/RangeIterator.to_json--crossover with--dataset/ETHPy150Open crossbario/txaio/txaio/aio.py/start_logging