/// <summary>
        ///   <para>Visual layout/appearance of the button.</para>
        /// </summary>
        /// <param name="widget">Widget to call method on.</param>
        /// <param name="layout">Layout of button.</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="IYandexLikeButtonWidget.Layout(string)"/>
        public static IYandexLikeButtonWidget Layout(this IYandexLikeButtonWidget widget, YandexLikeButtonLayout layout)
        {
            Assertion.NotNull(widget);

            return(widget.Layout(layout.ToString().ToLowerInvariant()));
        }
        /// <summary>
        ///   <para>Size of the button.</para>
        /// </summary>
        /// <param name="widget">Widget to call method on.</param>
        /// <param name="size">Size of button.</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="IYandexLikeButtonWidget.Size(string)"/>
        public static IYandexLikeButtonWidget Size(this IYandexLikeButtonWidget widget, YandexLikeButtonSize size)
        {
            Assertion.NotNull(widget);

            return(widget.Size(size.ToString().ToLowerInvariant()));
        }