class DocBookBuilder {
    final LinkedList<Element> stack = new LinkedList<Element>();
    final Document document;

    DocBookBuilder(Document document) {
        this.document = document;
        stack.addFirst(document.createElement("root"));
    }

    List<Element> getElements() {
        List<Element> elements = new ArrayList<Element>();

        assertThat(list.getLast(), is("1"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testAddFirst() throws Exception {
        list.addFirst("1");
        list.addFirst("2");
        assertThat(list.getFirst(), is("2"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testAddLast() throws Exception {

  /** Constructor for use by subclasses. */
  protected ForwardingDeque() {}

  @Override
  protected abstract Deque<E> delegate();

  @Override
  public void addFirst(@ParametricNullness E e) {
    delegate().addFirst(e);
  }

  @Override
  public void addLast(@ParametricNullness E e) {
    delegate().addLast(e);
  }

  @Override
  public Iterator<E> descendingIterator() {

            } else if (!blockContent.contains(name) && !(name.equals("a") && attributes.containsKey("name"))) {
                onInlineContent();
            }

            elementStack.addFirst(name);
            visitor.onStartHtmlElement(name);
            for (Map.Entry<String, String> entry : attributes.entrySet()) {
                visitor.onHtmlElementAttribute(entry.getKey(), entry.getValue());
            }

    public <T> T[] toArray(T[] array) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.toArray(array);
    }

    @Override
    public void addFirst(E e) {
      assertTrue(Thread.holdsLock(mutex));
      delegate.addFirst(e);
    }

    @Override
    public void addLast(E e) {
      assertTrue(Thread.holdsLock(mutex));
      delegate.addLast(e);
    }

    @Override

     * </p>
     *
     * @param disposable
     *            破棄可能なリソース。{@literal null}であってはいけません
     */
    public static synchronized void addFirst(final Disposable disposable) {
        assertArgumentNotNull("disposable", disposable);
        disposables.addFirst(disposable);
    }

    /**
     * 破棄可能なリソースを登録解除します。
     *
     * @param disposable
     *            破棄可能なリソース。{@literal null}であってはいけません
     */

        } else {
            return
        }

        typeTable['@role'] = 'dslTypes'
    }

    def mergeBlocks(Element blocksTable, DslDocModel model) {
        blocksTable.addFirst {
            thead {
                tr {
                    td('Block')
                    td('Description')
                }
            }
        }

    }

    /**
     * @throws Exception
     */
    @Test
    public void test4() throws Exception {
        DisposableUtil.add(new TestDisposable("a"));
        DisposableUtil.addFirst(new TestDisposable("b"));
        assertThat(DisposableUtil.disposables.size(), is(2));
        DisposableUtil.dispose();
        assertThat(count, is(2));
        assertThat(names, is("ab"));

    @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();
    }

            }

          val (_, nextPlan, failure) = connectResult

          if (failure != null) throw failure
          if (nextPlan != null) {
            routePlanner.deferredPlans.addFirst(nextPlan)
            continue
          }
        }
        return plan.handleSuccess()
      } catch (e: IOException) {
        if (firstException == null) {
          firstException = e
        } else {