public static TContentItem SetSlug <TContentItem>(this TContentItem contentItem, string name, string?value)
            where TContentItem : IContentElement
        {
            SlugField field = contentItem.GetField <SlugField>(name);

            field.Value = value;

            return(contentItem);
        }
        public static string?GetSlug(this IContentElement contentItem, string name)
        {
            SlugField field = contentItem.GetField <SlugField>(name);

            return(field.Value);
        }