@classmethod
    def get_info(cls):
        mod = try_import(cls.mod_name)
        if not mod:
            return None
        version = getattr(mod, '__version__', None) or getattr(mod, 'version',
                                                               None)
        return BackendInfo(version or 'deprecated', '')
Find nearest zero crossing in waveform before frame ``n``
dataset/ETHPy150Open mbr/flask-appconfig/flask_appconfig/server_backends.py/ServerBackend.get_info--crossover with--dataset/ETHPy150Open ucbvislab/radiotool/radiotool/composer/track.py/Track.zero_crossing_before