for (int i = 0; i < 100; i++) {
        Element element = Element.values()[random.nextInt(range)];
        elements.add(element);
        queue.add(element);
      }
      Iterator<Element> queueIterator = queue.iterator();
      int remaining = queue.size();
      while (queueIterator.hasNext()) {
        Element element = queueIterator.next();
        remaining--;

  final transient E element;

  SingletonImmutableSet(E element) {
    this.element = Preconditions.checkNotNull(element);
  }

  @Override
  public int size() {
    return 1;
  }

  @Override
  public boolean contains(@Nullable Object target) {
    return element.equals(target);
  }

  @Override
  public UnmodifiableIterator<E> iterator() {

        assertEquals("Custom message should match", "Test message", customAnnotation.message());
        assertEquals("Custom groups should have one element", 1, customAnnotation.groups().length);
        assertEquals("Custom payload should have one element", 1, customAnnotation.payload().length);
        assertEquals("Annotation type should be UriType", UriType.class, customAnnotation.annotationType());
    }

        if (value == null) {
            logError(element, "is missing");
        } else {
            validator.run();
        }
    }

    private void validateString(String element, String value) {
        validateNonNull(element, value, () -> validateNonEmpty(element, value, String::isBlank));
    }

                Map<Object, Object> context = Collections.emptyMap();

                for (Plugin element : src) {
                    Object key = getPluginKey(element);
                    managedPlugins.put(key, element);
                }

                for (Plugin element : tgt) {
                    Object key = getPluginKey(element);
                    Plugin managedPlugin = managedPlugins.get(key);

  @Override
  void setCountCheckReturnValue(E element, int count) {
    assertTrue(
        "setCount() with the correct expected present count should return true",
        setCount(element, count));
  }

  @Override
  void setCountNoCheckReturnValue(E element, int count) {
    setCount(element, count);
  }

  @CanIgnoreReturnValue
  private boolean setCount(E element, int count) {

  @Override
  public int add(@ParametricNullness E element, int occurrences) {
    if (occurrences == 0) {
      return count(element);
    }
    checkArgument(occurrences > 0, "occurrences cannot be negative: %s", occurrences);
    Count frequency = backingMap.get(element);
    int oldCount;
    if (frequency == null) {
      oldCount = 0;
      backingMap.put(element, new Count(occurrences));
    } else {

      Iterable<? extends E> elements) {
    checkNotNull(elements); // for GWT
    // Let ArrayList's sizing logic work, if possible
    return (elements instanceof Collection)
        ? new ArrayList<>((Collection<? extends E>) elements)
        : newArrayList(elements.iterator());
  }

  /**
   * Creates a <i>mutable</i> {@code ArrayList} instance containing the given elements; a very thin

   * Returns a fluent iterable containing the specified elements in order.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link java.util.stream.Stream#of(Object[])
   * Stream.of(T...)}.
   *
   * @since 20.0
   */
  public static <E extends @Nullable Object> FluentIterable<E> of(
      @ParametricNullness E element, E... elements) {
    return from(Lists.asList(element, elements));
  }

  /**

   * Returns a fluent iterable containing the specified elements in order.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link java.util.stream.Stream#of(Object[])
   * Stream.of(T...)}.
   *
   * @since 20.0
   */
  public static <E extends @Nullable Object> FluentIterable<E> of(
      @ParametricNullness E element, E... elements) {
    return from(Lists.asList(element, elements));
  }

  /**