anchor.diff:              | IsLarge -> { result with Size = Classes.Size.IsLarge |> Some }
               | IsHalfHeight -> { result with Size = Classes.Size.IsHalfHeight |> Some }
               | IsFullHeight -> { result with Size = Classes.Size.IsFullHeight |> Some }
  +            | IsFullheightWithNavbar -> { result with Size = Classes.Size.IsFullheightWithNavbar |> Some }
               | Color color -> { result with Color = ofColor color |> Some }
               | IsBold -> { result with IsBold = true }
               | CustomClass customClass -> { result with CustomClass = Some customClass }
  
positive.code:             let [<Literal>] IsLarge = "is-large"
              let [<Literal>] IsHalfHeight = "is-halfheight"
              let [<Literal>] IsFullHeight = "is-fullheight"
  
      type Option =
          /// Add `is-bold` class
  
negative.code:         /// Add `is-halfheight` class
          | IsHalfHeight
          /// Add `is-fullheight` class
          /// Add `is-fullheight-with-navbar` class
          | IsFullheightWithNavbar
          | IsFullHeight
          | Color of IColor
          | CustomClass of string
  