def METHOD_NAME(
        cls, follower_id: Optional[str],
        object_id: Optional[str]) -> Optional[Self]:
    '''Return a ModelFollowingModel object for the given follower_id and
    object_id, or None if no such follower exists.
    '''
    query = cls._get(follower_id, object_id)
    following = cls._filter_following_objects(query)
    if len(following) == 1:
        return following[0]
    return None