pop();
                inPara = true;
            }
        }
        stack.getFirst().appendChild(node);
        if (inPara) {
            Element para = document.createElement("para");
            push(para);
        }
    }

    public void push(Element element) {
        stack.getFirst().appendChild(element);

        assertEquals(1, list.size());
        assertEquals("playwright", list.get(0).getFirst());
        assertEquals("http://.*", list.get(0).getSecond().pattern());

        list = crawlerThread.getClientRuleList("playwright:http://.*,playwright:https://.*");
        assertEquals(2, list.size());
        assertEquals("playwright", list.get(0).getFirst());
        assertEquals("http://.*", list.get(0).getSecond().pattern());

     */
    @Test
    public void testGetFirst() throws Exception {
        try {
            list.getFirst();
            fail();
        } catch (final NoSuchElementException ex) {
            System.out.println(ex);
        }
        list.addFirst("1");
        assertThat(list.getFirst(), is("1"));
    }

    /**
     * @throws Exception
     */
    @Test

            this.visitor = visitor;
        }

        private void unwindTo(String element, TokenVisitor visitor) {
            if (elementStack.contains(element)) {
                while (!elementStack.getFirst().equals(element)) {
                    visitor.onEndHtmlElement(elementStack.removeFirst());
                }
                elementStack.removeFirst();
                visitor.onEndHtmlElement(element);
            }

    @Override
    public @Nullable E pollLast() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.pollLast();
    }

    @Override
    public E getFirst() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.getFirst();
    }

    @Override
    public E getLast() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.getLast();
    }

    @Override

    delegate().addLast(e);
  }

  @Override
  public Iterator<E> descendingIterator() {
    return delegate().descendingIterator();
  }

  @Override
  @ParametricNullness
  public E getFirst() {
    return delegate().getFirst();
  }

  @Override
  @ParametricNullness
  public E getLast() {
    return delegate().getLast();
  }

  @CanIgnoreReturnValue // TODO(cpovirk): Consider removing this?
  @Override

                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("searchField", searchFieldMap);
        final Map<String, List<String>> headerMap = headerList.stream()
                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("headers", headerMap);

            final List<String> contentList = new ArrayList<>();
            final String content = pair.getFirst().get(toLowerCase(query));
            if (StringUtil.isNotBlank(content)) {
                contentList.add(content);
            }
            for (final Pair<Pattern, String> regexData : pair.getSecond()) {
                if (regexData.getFirst().matcher(query).matches()) {

    private final LinkedList<String> contextStack = new LinkedList<String>();

    @Override
    public void warning(String message) {
        LOGGER.warn(String.format("%s: %s", contextStack.getFirst(), message));
    }

    @Override
    public void start(String context) {
        contextStack.addFirst(context);
    }

    @Override
    public void finish() {
        contextStack.removeFirst();

                    parseHtmlEncodedChar(text);
                } else if (scanner.lookingAt(HTML_ENTITY)) {
                    parseHtmlEntity(text);
                } else {
                    text.append(scanner.getFirst());
                    scanner.next();
                }
            }

            visitor.onText(text.toString());
        }
        visitor.onEnd();
    }

    private void skipComment() {