def get_requires_for_build_wheel(config_settings=None):
    """
    Returns an additional list of requirements for building, as PEP508 strings,
    above and beyond those specified in the pyproject.toml file.

    This implementation is optional. At the moment it only returns an empty list,
    which would be the same as if not define. So this is just for completeness
    for future implementation.
    """
    return []