depth = parent.depth + 1;
        parents = new ArrayList<>();
        parents.addAll(parent.parents);
        parents.add(parent.getKey());
        this.parent = parent;
    }

    public Artifact getArtifact() {
        return artifact;
    }

    public Object getKey() {
        return artifact.getDependencyConflictId();
    }

    public void addDependencies(

    public void remove() {
      checkState(lastReturned != null);
      LocalCache.this.remove(lastReturned.getKey());
      lastReturned = null;
    }
  }

  final class KeyIterator extends HashIterator<K> {

    @Override
    public K next() {
      return nextEntry().getKey();
    }
  }

  final class ValueIterator extends HashIterator<V> {

    @Override

    boolean changed = false;
    while (entryIterator.hasNext()) {
      Entry<K, Collection<V>> entry = entryIterator.next();
      K key = entry.getKey();
      Collection<V> collection = filterCollection(entry.getValue(), new ValuePredicate(key));
      if (!collection.isEmpty()
          && predicate.apply(Maps.<K, Collection<V>>immutableEntry(key, collection))) {

    assertThat(map.containsKey(refreshKey)).isFalse();

    // let computation complete
    letGetFinishSignal.countDown();
    getFinishedSignal.await();
    checkNothingLogged();

    // results should be visible
    assertThat(cache.size()).isEqualTo(2);
    assertThat(map.get(getKey)).isEqualTo(getKey + suffix);
    assertThat(map.get(refreshKey)).isEqualTo(refreshKey + suffix);

      if (next == null) {
        throw new NoSuchElementException();
      }
      current = next;
      seenKeys.add(current.getKey());
      do { // skip ahead to next unseen key
        next = next.next;
      } while ((next != null) && !seenKeys.add(next.getKey()));
      return current.getKey();
    }

    @Override
    public void remove() {
      checkForConcurrentModification();

                    final Boolean b = (Boolean) xObj.value();
                    putResultDataBody(dataMap, entry.getKey(), b.toString());
                    break;
                case NUMBER:
                    final Number d = (Number) xObj.value();
                    putResultDataBody(dataMap, entry.getKey(), d.toString());
                    break;
                case STRING:

            for (Entry<Range<Integer>, Integer> entry : rangeMap.asMapOfRanges().entrySet()) {
              if (entry.getKey().isConnected(subRange)
                  && !entry.getKey().intersection(subRange).isEmpty()) {
                expectedBuilder.put(entry.getKey().intersection(subRange), entry.getValue());
              }
            }

    assertThat(entry.getKey()).isEqualTo("foo");
    assertThat(entry.getValue()).containsExactly(5, 3).inOrder();
    entry = collectionIterator.next();
    assertThat(entry.getKey()).isEqualTo("bar");
    assertThat(entry.getValue()).containsExactly(4, 1).inOrder();
    entry = collectionIterator.next();
    assertThat(entry.getKey()).isEqualTo("cow");
    assertThat(entry.getValue()).contains(2);

        valueMap.put("user", user.map(FessUserBean::getUserId).orElse("-"));
        final Comparator<Map.Entry<String, String>> c = Comparator.comparing(Map.Entry::getKey);
        params.entrySet().stream().sorted(c).forEach(e -> {
            valueMap.put(e.getKey(), e.getValue().replace('\t', '_'));
        });
        log(valueMap);
    }

    /**
     * Log the value map.
     * @param valueMap The value map.

        json.append("{\n");

        boolean first = true;
        for (final Map.Entry<String, Object> entry : source.entrySet()) {
            final String field = entry.getKey();
            if (excludeFields.contains(field)) {
                continue;
            }

            final Object value = entry.getValue();
            if (value == null) {
                continue;