public static Navbar <THelper> SetInverse <THelper>(this Navbar <THelper> navbar, bool inverse = true)
     where THelper : BootstrapHelper <THelper>
 {
     return(navbar.ToggleCss(Css.NavbarInverse, inverse));
 }
 public static Navbar <THelper> SetPosition <THelper>(this Navbar <THelper> navbar, NavbarPosition position)
     where THelper : BootstrapHelper <THelper>
 {
     return(navbar.ToggleCss(position));
 }