def register(models: Union[DataType, Sequence[DataType]]):
        """For registering classes manually. It accepts a single class or a sequence of
        classes."""
        if not isinstance(models, Sequence):
            models = [models]
        for val in models:
            ModelStore.register(val)
For registering classes manually. It accepts a single class or a sequence of
        classes.
src/datachain/lib/data_model.py