assertEquals("Should be able to peek() at first element", "A", peekingIterator.peek());
    assertEquals(
        "Should be able to peek() first element multiple times", "A", peekingIterator.peek());
    assertEquals(
        "next() should still return first element after peeking", "A", peekingIterator.next());

    assertEquals("Should be able to peek() at middle element", "B", peekingIterator.peek());
    assertEquals(

    }

    /**
     * Removes an element from its parent.
     *
     * @param element the element to remove
     *
     */
    public static void removeElement(Element element) {
        Editor editor = new Editor(element.document());
        editor.removeElement(element);
    }

    /**
     * Convenience method to add GAV (groupId, artifactId, version) elements to a parent.
     *

  public static boolean contains(Iterable<?> iterable, @Nullable Object element) {
    if (iterable instanceof Collection) {
      Collection<?> collection = (Collection<?>) iterable;
      return Collections2.safeContains(collection, element);
    }
    return Iterators.contains(iterable.iterator(), element);
  }

  /**
   * Removes, from an iterable, every element that belongs to the provided collection.
   *

     * {@code list.size()} if there is no such element.
     *
     * <p>Note that the return value will be {@code >= 0} if and only if there is an element of the
     * list that compares as equal to the key.
     *
     * <p>This is equivalent to the behavior of {@link java.util.Collections#binarySearch(List,

      return unfiltered.add(element, occurrences);
    }

    @Override
    public int remove(@Nullable Object element, int occurrences) {
      checkNonnegative(occurrences, "occurrences");
      if (occurrences == 0) {
        return count(element);
      } else {
        return contains(element) ? unfiltered.remove(element, occurrences) : 0;
      }

      return unfiltered.add(element, occurrences);
    }

    @Override
    public int remove(@Nullable Object element, int occurrences) {
      checkNonnegative(occurrences, "occurrences");
      if (occurrences == 0) {
        return count(element);
      } else {
        return contains(element) ? unfiltered.remove(element, occurrences) : 0;
      }

  public void testHashCode_containingNull() {
    Collection<E> elements = getSampleElements(getNumElements() - 1);
    int expectedHashCode = 0;
    for (E element : elements) {
      expectedHashCode += (element == null) ? 0 : element.hashCode();
    }

    elements.add(null);
    collection = getSubjectGenerator().create(elements.toArray());
    assertEquals(

        Document doc = Document.of(pomXml);
        Element root = doc.root();

        Element buildElement = DomUtils.findChildElement(root, "build");
        assertNotNull(buildElement, "Should find build element");

        Element pluginsElement = DomUtils.findChildElement(buildElement, "plugins");
        assertNotNull(pluginsElement, "Should find plugins element");
    }

    @Test

    if (occurrences == 0) {
      return count(element);
    }
    checkArgument(occurrences > 0, "occurrences cannot be negative: %s", occurrences);
    int entryIndex = backingMap.indexOf(element);
    if (entryIndex == -1) {
      backingMap.put(element, occurrences);
      size += occurrences;
      return 0;
    }
    int oldCount = backingMap.getValue(entryIndex);

    }

    boolean isMultiValued() {
        return multiValued
    }

    TypeMetaData getType() {
        return type
    }

    Element getDescription() {
        return blockMethod.description;
    }

    List<Element> getComment() {
        return blockMethod.comment
    }

    boolean isDeprecated() {
        return blockProperty.deprecated || blockMethod.deprecated
    }