def validates_schema(
    fn=None,
    pass_many=False,
    pass_original=False,
    skip_on_field_errors=True,
):
    """Register a schema-level validator.

    By default, receives a single object at a time, regardless of whether ``many=True``
    is passed to the `Schema`. If ``pass_many=True``, the raw data (which may be a collection)
    and the value for ``many`` is passed.

    If ``pass_original=True``, the original data (before unmarshalling) will be passed as
    an additional argument to the method.

    If ``skip_on_field_errors=True``, this validation method will be skipped whenever
    validation errors have been detected when validating fields.

    .. versionchanged:: 3.0.0b1
        ``skip_on_field_errors`` defaults to `True`.
    """
    return set_hook(
        fn,
        (VALIDATES_SCHEMA, pass_many),
        pass_original=pass_original,
        skip_on_field_errors=skip_on_field_errors,
    )