def exists(self, path_glob):
        raise NotImplementedError
*musicpd.org, music database section:*
dataset/ETHPy150Open Yelp/mrjob/mrjob/fs/base.py/Filesystem.exists--crossover with--dataset/ETHPy150Open mopidy/mopidy/mopidy/mpd/protocol/music_db.py/list_