@abc.abstractmethod
    def count(self, path):
        pass
An aggregator accumulates metrics via the :meth:`add_metrics()` call
dataset/ETHPy150Open spotify/luigi/luigi/contrib/hdfs/abstract_client.py/HdfsFileSystem.count--crossover with--dataset/ETHPy150Open kiip/statsite/statsite/aggregator.py/Aggregator.__init__