def list(self, prefix=None):
        raise NotImplementedError()
Unit of measurement of this entity, if any.
dataset/ETHPy150Open mindsnacks/Zinc/src/zinc/storages/__init__.py/StorageBackend.list--crossover with--dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/sensor/nzbget.py/NZBGetSensor.unit_of_measurement