* Creates and returns a new instance of {@link ConcurrentSkipListSet}.
     *
     * @param <E> the element type of {@link ConcurrentSkipListSet}
     * @return a new instance of {@link ConcurrentSkipListSet}
     * @see ConcurrentSkipListSet#ConcurrentSkipListSet()
     */
    public static <E> ConcurrentSkipListSet<E> newConcurrentSkipListSet() {
        return new ConcurrentSkipListSet<>();
    }

    /**