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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_featured_or_none(cls, start_date=None):
 """Get the latest featured community. :param start_date: Date after which the featuring starts :returns: Community object or None :rtype: `invenio_communities.models.Community` or None """

        start_date = start_date or datetime.utcnow()

        comm = cls.query.filter(
            FeaturedCommunity.start_date <= start_date
        ).order_by(
            cls.start_date.desc()
        ).first()
        return comm if comm is None else comm.community