code: public void shutdown() {
  		Iterator<ExclusionFilterFactory> itr = factories.iterator();
  		while (itr.hasNext()) {
  			ExclusionFilterFactory i = itr.next();
  			i.shutdown();
  		}
  	}
docs: /*
  (non-Javadoc)
  
  @see org.archive.wayback.accesscontrol.ExclusionFilterFactory#shutdown()