anchor.diff:      and DecorationRenderOptions =
           inherit ThemableDecorationRenderOptions
           abstract isWholeLine: bool option with get, set
  -        abstract overviewRulerLane: obj (* TODO: OverviewRulerLane*) option with get, set
  +        abstract overviewRulerLane: OverviewRulerLane option with get, set
           abstract light: ThemableDecorationRenderOptions option with get, set
           abstract dark: ThemableDecorationRenderOptions option with get, set
   
  
positive.code: open System
  open Fabel.Core
  open Fabel.Import.JS
  
  module vscode =
      type Command =
  
negative.code:         abstract options: TextEditorOptions with get, set
          abstract edit: callback: Func<TextEditorEdit, unit> -> Thenable<bool>
          abstract setDecorations: decorationType: TextEditorDecorationType * rangesOrOptions: U2<ResizeArray<Range>, ResizeArray<DecorationOptions>> -> unit
          abstract revealRange: range: Range * ?revealType: TextEditorRevealType -> unit
          abstract show: ?column: ViewColumn -> unit
          abstract hide: unit -> unit
  
      and TextEditorEdit =
  