@LazyInit @CheckForNull private transient TypeResolver covariantTypeResolver;

  /**
   * Constructs a new type token of {@code T}.
   *
   * <p>Clients create an empty anonymous subclass. Doing so embeds the type parameter in the
   * anonymous class's type hierarchy so we can reconstitute it at runtime despite erasure.
   *
   * <p>For example:
   *
   * <pre>{@code

  static <T extends @Nullable Object> UnmodifiableListIterator<T> emptyListIterator() {
    return (UnmodifiableListIterator<T>) ArrayItr.EMPTY;
  }

  /**
   * This is an enum singleton rather than an anonymous class so ProGuard can figure out it's only
   * referenced by emptyModifiableIterator().
   */
  private enum EmptyModifiableIterator implements Iterator<Object> {
    INSTANCE;

    @Override

  static <T extends @Nullable Object> UnmodifiableListIterator<T> emptyListIterator() {
    return (UnmodifiableListIterator<T>) ArrayItr.EMPTY;
  }

  /**
   * This is an enum singleton rather than an anonymous class so ProGuard can figure out it's only
   * referenced by emptyModifiableIterator().
   */
  private enum EmptyModifiableIterator implements Iterator<Object> {
    INSTANCE;

    @Override