docs: public List<List<Object>> getTuples() {
      Iterator<KeyValue> keyValueIter = indicators.keyValueIterator();
      List<List<Object>> tuples = Lists.newArrayList();
      while (keyValueIter.hasNext()) {
        KeyValue keyValue = keyValueIter.next();
        if (keyValue.getValue() != 0.0) {
          tuples.add(vars.intArrayToAssignment(keyValue.getKey()).getValues());
        }
      }
      return tuples;
    }