@Deprecated
    public HashSet<String> unvisitedHubs() throws Exception {
        HashSet<String> result = new HashSet<String>();
        List<Tuple<LinkRelevance>> tuples = urlRelevance.getTable();
        for (Tuple<LinkRelevance> tuple : tuples) {
            double value = tuple.getValue().getRelevance();
            if (value > 100 && value < 200) {
                result.add(URLDecoder.decode(tuple.getKey(), "UTF-8"));
            }
        }
        return result;
    }
DEPRECATED: may cause OutOfMemoryError on large crawls. TODO: Provide an method that uses an
iterator, and/or load just a sample of the data.
ache/src/main/java/achecrawler/link/frontier/Frontier.java