PreOrderIterator(T root) {
      this.stack = new ArrayDeque<>();
      stack.addLast(singletonIterator(checkNotNull(root)));
    }

    @Override
    public boolean hasNext() {
      return !stack.isEmpty();
    }

    @Override
    public T next() {
      Iterator<T> itr = stack.getLast(); // throws NSEE if empty
      T result = checkNotNull(itr.next());
      if (!itr.hasNext()) {

    assertThat(rangeSet.asRanges()).isEmpty();
    assertEquals(ImmutableRangeSet.<Integer>all(), rangeSet.complement());
    assertFalse(rangeSet.contains(0));
    assertFalse(rangeSet.intersects(Range.singleton(0)));
    assertFalse(rangeSet.encloses(Range.singleton(0)));
    assertTrue(rangeSet.enclosesAll(rangeSet));
    assertTrue(rangeSet.isEmpty());
  }

  public void testAll() {

     * @param keyList The list of keys to register this extractor under.
     */
    public void register(final List<String> keyList) {
        if (keyList == null || keyList.isEmpty()) {
            throw new IllegalArgumentException("keyList must not be null or empty.");
        }
        getExtractorFactory().addExtractor(keyList, this);
    }

    /**

  @Override
  public boolean containsAll(Collection<?> c) {
    assertTrue(Thread.holdsLock(mutex));
    return super.containsAll(c);
  }

  @Override
  public boolean isEmpty() {
    assertTrue(Thread.holdsLock(mutex));
    return super.isEmpty();
  }

  /*
   * We don't assert that the lock is held during calls to iterator(), stream(), and spliterator:

     */
    public List<String> getUrlList(final String userCode, final List<String> urlList) {
        if (urlList.isEmpty()) {
            return urlList;
        }

        return userInfoBhv.selectByPK(userCode).map(userInfo -> {
            final ListResultBean<FavoriteLog> list = favoriteLogBhv.selectList(cb2 -> {

                fileAuthenticationService.getFileAuthenticationList(fileAuthenticationPager)); // page navi
        RenderDataUtil.register(data, "displayCreateLink", !crawlingConfigHelper.getAllFileConfigList(false, false, false, null).isEmpty());
        // restore from pager
        copyBeanToBean(fileAuthenticationPager, form, op -> op.include("id"));
    }

    // ===================================================================================

        RenderDataUtil.register(data, "displayCreateLink", !crawlingConfigHelper.getAllWebConfigList(false, false, false, null).isEmpty());

        // restore from pager
        copyBeanToBean(reqHeaderPager, form, op -> op.include("id"));
    }

    // ===================================================================================

        return parent.hashCode();
    }

    @Override
    public int indexOf(final Object o) {
        return parent.indexOf(o);
    }

    @Override
    public boolean isEmpty() {
        return parent.isEmpty();
    }

    @Override
    public Iterator<Map<String, Object>> iterator() {
        return parent.iterator();
    }

    @Override
    public int lastIndexOf(final Object o) {

     * @return true if the document matches the expression, false otherwise
     */
    public boolean match(final Map<String, Object> map) {

        if (map == null || map.isEmpty() || matchExpression == null) {
            return false;
        }

        final Object value = ComponentUtil.getScriptEngineFactory().getScriptEngine(scriptType).evaluate(matchExpression, map);

      Key key = new Key(1);
      String value = key.toString();
      assertSame(value, cache.getUnchecked(key));
      assertFalse(cache.asMap().isEmpty());
      cache.invalidateAll();
      assertEquals(0, cache.size());
      assertTrue(cache.asMap().isEmpty());
      assertFalse(cache.asMap().containsKey(key));
      assertFalse(cache.asMap().containsValue(value));
    }
  }