public static <E> CopyOnWriteArraySet<E> newCopyOnWriteArraySet() {
    return new CopyOnWriteArraySet<E>();
  }
Creates an empty {@code CopyOnWriteArraySet} instance.

<p><b>Note:</b> if you need an immutable empty {@link Set}, use {@link Collections#emptySet}
instead.

@return a new, empty {@code CopyOnWriteArraySet}
@since 12.0
fbcore/src/main/java/com/facebook/common/internal/Sets.java