src/transformers/integrations.py/NeptuneCallback/__init__
class NeptuneCallback:    def __init__(self):
        assert (
            is_neptune_available()
        ), "NeptuneCallback requires neptune-client to be installed. Run `pip install neptune-client`."
        import neptune.new as neptune

        self._neptune = neptune
        self._initialized = False
        self._log_artifacts = False