anchor.diff:      inherit TextEditorExtension()
       let mutable treeView : PadTreeView option = None
       let mutable refreshingOutline : bool = false
  -    let mutable timerId : uint32 = 0u
   
       override x.Initialize() = 
           base.Initialize()
  
positive.code: 
                  let treeCol = new TreeViewColumn()
                  treeCol.PackStart(pixRenderer, false)
                  // treeCol.AddAttribute (padTreeView.TextRenderer,"text",1)
                  treeCol.SetCellDataFunc(pixRenderer, new TreeCellDataFunc(setCellIcon))
                  treeCol.PackStart(padTreeView.TextRenderer, true)
                  treeCol.SetCellDataFunc(padTreeView.TextRenderer, new TreeCellDataFunc(setCellText))
  
negative.code:                               ()
                      | false -> ()
  
                  treeView <- Some padTreeView
  
                  let pixRenderer = new CellRendererImage()
  