def ifUKsetGB(country):
    """
    str -> str
    django-countries uses ISO 3166 for country codes, and GB is the UK's ISO 3166 country code.
    However, the .uk domain was created separately a few months before and .gb was never
    widely used and it is no longer possible to register under that domain.
    """
    return country if country != "UK" else "GB"