anchor.diff:              function
               | Add -> Sync (fun m -> ())
   
  -let w = new Window()
  +let w = new ListViewWindow()
   let app = if Application.Current = null then Application() else Application.Current
   let lm = ListModel()
  -let v = ListView(Window(),lm)
  +let v = ListView(w,lm)
   let c = ListController()
   let loop = EventLoop(v, c)
   loop.Start()
  
positive.code: #r "PresentationCore.dll"
  #r "PresentationFramework.dll"
  #r "System.Numerics.dll"
  #r "Rx-Core/lib/net45/System.Reactive.Core.dll"
  #r "Rx-Interfaces/lib/net45/System.Reactive.Interfaces.dll"
  #r "Rx-Linq/lib/net45/System.Reactive.Linq.dll"
  
negative.code: open System.Windows
  open FSharp.Qualia
  open System.Collections.ObjectModel
  open System.Windows.Controls
  
  (**
  Collections
  