@classmethod
def make_new_swarm(cls):
    """Make new swarm (new class)."""
    name = cls.__name__ + str(cls.number_of_borgs)
    cls.number_of_borgs += 1
    new_borg = type(name, cls.__bases__, dict(cls.__dict__))
    new_borg.reset_state()
    return new_borg
