code: public static Set<String> getRepresentatives(AstralSet cutoff) {
  		if (instances.containsKey(cutoff.getId()) && instances.get(cutoff.getId()).get() != null) {
  			return instances.get(cutoff.getId()).get().getNames();
  		}
  		Astral astral = new Astral(cutoff);
  		instances.put(cutoff.getId(), new SoftReference<Astral>(astral));
  		return astral.getNames();
  	}
docs: Get a list of representatives' names for the specified ASTRAL cutoff.