/// <summary>
        ///   <para>Count box position.</para>
        /// </summary>
        /// <param name="widget">Widget to call method on.</param>
        /// <param name="position">Count box position.</param>
        /// <returns>Reference to provided <paramref name="widget"/>.</returns>
        /// <exception cref="ArgumentNullException">If <paramref name="widget"/> is a <c>null</c> reference.</exception>
        /// <seealso cref="ITwitterTweetButtonWidget.CounterPosition(string)"/>
        public static ITwitterTweetButtonWidget CounterPosition(this ITwitterTweetButtonWidget widget, TwitterTweetButtonCountBoxPosition position)
        {
            Assertion.NotNull(widget);

            return(widget.CounterPosition(position.ToString().ToLowerInvariant()));
        }