@Override
  public Iterator<E> iterator() {
    return new Itr(toArray());
  }

  /** Snapshot iterator that works off copy of underlying q array. */
  private class Itr implements Iterator<E> {
    final Object[] array; // Array of all elements
    int cursor; // index of next element to return;
    int lastRet; // index of last element, or -1 if no such

    Itr(Object[] array) {
      lastRet = -1;

      } else {
        return ImmutableEnumSet.asImmutable(EnumSet.copyOf(collection));
      }
    } else {
      Iterator<E> itr = elements.iterator();
      if (itr.hasNext()) {
        EnumSet<E> enumSet = EnumSet.of(itr.next());
        Iterators.addAll(enumSet, itr);
        return ImmutableEnumSet.asImmutable(enumSet);
      } else {
        return ImmutableSet.of();
      }
    }
  }

  /**

    } else {
      return new Itr<E>(this, index);
    }
  }

  /** A singleton implementation of iterator() for the empty ImmutableList. */
  // TODO(b/345814817): Move this to RegularImmutableList?
  @SuppressWarnings("ClassInitializationDeadlock")
  private static final UnmodifiableListIterator<Object> EMPTY_ITR =
      new Itr<Object>(RegularImmutableList.EMPTY, 0);

  @Override
  public Iterator<E> iterator() {
    final Monitor monitor = this.monitor;
    monitor.enter();
    try {
      return new Itr();
    } finally {
      monitor.leave();
    }
  }

  /** Iterator for MonitorBasedArrayBlockingQueue */
  private class Itr implements Iterator<E> {
    /** Index of element to be returned by next, or a negative number if no such. */
    private int nextIndex;

    /**

        public static final String CACHE_ARTIFACT_NOT_FOUND = "canf";
        public static final String STRICT_ARTIFACT_DESCRIPTOR_POLICY = "sadp";
        public static final String IGNORE_TRANSITIVE_REPOSITORIES = "itr";

        @Override
        protected void prepareOptions(org.apache.commons.cli.Options options) {
            super.prepareOptions(options);
            options.addOption(Option.builder(ALTERNATE_POM_FILE)

    public static final String CACHE_ARTIFACT_NOT_FOUND = "canf";

    public static final String STRICT_ARTIFACT_DESCRIPTOR_POLICY = "sadp";

    public static final String IGNORE_TRANSITIVE_REPOSITORIES = "itr";

    public static final String DEBUG = "debug";
    public static final String ENC = "enc";
    public static final String YJP = "yjp";

    protected Options options;

    assertEquals(ImmutableList.of(-1, 3, 5), result);
  }

  public void testLeastOfIterator_simple_nMinusOne_withNullElement() {
    Iterator<@Nullable Integer> itr = Iterators.forArray(3, null, 5, -1);
    List<@Nullable Integer> result = Ordering.<Integer>natural().nullsLast().leastOf(itr, 3);
    assertTrue(result instanceof RandomAccess);
    assertListImmutable(result);
    assertEquals(ImmutableList.of(-1, 3, 5), result);
  }

    assertEquals(ImmutableList.of(-1, 3, 5), result);
  }

  public void testLeastOfIterator_simple_nMinusOne_withNullElement() {
    Iterator<@Nullable Integer> itr = Iterators.forArray(3, null, 5, -1);
    List<@Nullable Integer> result = Ordering.<Integer>natural().nullsLast().leastOf(itr, 3);
    assertTrue(result instanceof RandomAccess);
    assertListImmutable(result);
    assertEquals(ImmutableList.of(-1, 3, 5), result);
  }

HSPLkotlin/collections/SetsKt__SetsKt;->optimizeReadOnlyList(Ljava/util/List;)Ljava/util/List;
HSPLkotlin/collections/builders/ListBuilder$Itr;-><init>(Lkotlin/collections/builders/ListBuilder;I)V
HSPLkotlin/collections/builders/ListBuilder$Itr;->hasNext()Z
HSPLkotlin/collections/builders/ListBuilder$Itr;->next()Ljava/lang/Object;
HSPLkotlin/collections/builders/ListBuilder;-><init>()V