code: @Override
      public void printRanking(final Long user, final List<Pair<Long, Double>> scoredItems, final PrintStream out, final OUTPUT_FORMAT format) {
          final Map<Long, Double> scores = new HashMap<Long, Double>();
          for (Pair<Long, Double> p : scoredItems) {
              scores.put(p.getFirst(), p.getSecond());
          }
          printRanking("" + user, scores, out, format);
      }
docs: {@inheritDoc}