How to use the drama.AsymmetricFriendship function in drama

def _excavate_asymmetric_friendships(self):
        """Recognizes cases where a character A considers another, B, to be a friend,
        while B considers A to be an enemy.
        """
        asymmetric_friendships = []
        for person in self.simulation.town.residents:
            for friend in person.friends:
                if friend.dislikes(person):
                    asymmetric_friendships.append(AsymmetricFriendship(subjects=(person, friend)))
        return asymmetric_friendships