anchor.diff:      let children = base.Children
       let verticalScrollBar = marginContainer.GetTextViewMargin(PredefinedMarginNames.VerticalScrollBar)
       let mutable markerData = Unchecked.defaultof<_>
  +    let markerBrush = SolidColorBrush(Color.FromRgb(255uy, 165uy, 0uy))
   
       let updateDisplay () =
           if not textView.IsClosed then
  
positive.code:                 let virtualAdditionalLines = int (textView.ViewportHeight / textView.LineHeight) - 1
                  let lineHeight = textView.ViewportHeight / float (totalLines + virtualAdditionalLines)
                  for (lineNo, pos) in markerData do               
                      let markerHeight = max 4.0 (lineHeight / 2.0)
                      let markerWidth = verticalScrollBar.MarginSize
                      let marker = Rectangle(Fill = Brushes.Orange, StrokeThickness = 2.0, Stroke = Brushes.DarkOrange,
                                              Height = markerHeight, Width = markerWidth)
                      // Try to place the marker on top of vertical scroll bar
                      Canvas.SetLeft(marker, -markerWidth)
                      Canvas.SetTop(marker, float lineNo * lineHeight)
                      marker.MouseDown.Add(fun _ -> 
                          let line = textView.TextSnapshot.GetLineFromLineNumber(lineNo)
                          textView.Caret.MoveTo(VirtualSnapshotPoint(textView.TextSnapshot, pos)) |> ignore
                          textView.ViewScroller.EnsureSpanVisible(SnapshotSpan(line.Start, 0), EnsureSpanVisibleOptions.ShowStart))
                      children.Add(marker) |> ignore
  
      let docEventListener = new DocumentEventListener ([ViewChange.classificationChangedEvent classifier], 200us, updateDisplay)
  
negative.code: open Microsoft.VisualStudio.Text
  open Microsoft.VisualStudio.Text.Tagging
  open Microsoft.VisualStudio.Text.Classification
  open System.Windows.Input
  
  [<Name(Constants.fsharpUnusedDeclarationMargin)>]
  type UnusedDeclarationMargin(textView: IWpfTextView, marginContainer: IWpfTextViewMargin,
  