/// <summary>
        /// Sets how long the message animates out (in seconds).
        /// </summary>
        /// <param name="builder">The builder.</param>
        /// <param name="duration">How long the message should animate out (in seconds).</param>
        /// <returns>Returns the notification message builder.</returns>
        public static NotificationMessageBuilder AnimationOutDuration(
            this NotificationMessageBuilder builder,
            double duration)
        {
            builder.SetAnimationOutDuration(duration);

            return(builder);
        }