// NavbarText

        public static NavbarText <THelper> NavbarText <THelper>(this INavbarButtonCreator <THelper> creator, string text = null)
            where THelper : BootstrapHelper <THelper>
        {
            return(new NavbarText <THelper>(creator).SetText(text));
        }
        // NavbarButton

        public static NavbarButton <THelper> NavbarButton <THelper>(this INavbarButtonCreator <THelper> creator, string text = null, object value = null)
            where THelper : BootstrapHelper <THelper>
        {
            return(new NavbarButton <THelper>(creator).SetText(text).SetValue(value));
        }