anchor.diff:              | IsInvisibleOnly (_, false) -> result
               | IsHiddenOnly (screen, true) -> { result with IsHiddenOnly = result.IsHiddenOnly + " " + ofHidden screen }
               | IsHiddenOnly (_, false) -> result
  +            | IsSrOnly -> { result with IsSrOnly = Classes.Helpers.IsSrOnly }
  +            | IsScreenReaderOnly -> { result with IsSrOnly = Classes.Helpers.IsSrOnly }
   
           let opts = options |> List.fold parseOption Options.Empty
           [ opts.BackgroundColor
  
positive.code:         | IsHidden of Screen * bool
          | IsInvisibleOnly of Screen * bool
          | IsHiddenOnly of Screen * bool
  
      type internal Options =
          { BackgroundColor : string option
  
negative.code:               IsInvisibleOnly = ""
                IsHiddenOnly = ""
                Display = ""
                DisplayOnly = ""
                IsSrOnly = "" }
  
      let parseModifiers options =
          let parseOption result opt =
  