anchor.diff:                           Entity.DownImage == Assets.Gui.ButtonBigDownImage
                            Entity.ClickEvent ==> msg (fieldMsg index)])
   
  -        static let items (position : Vector2) elevation columns field fieldMsg =
  +        let items (position : Vector2) elevation columns field fieldMsg =
               Content.entities field
                   (fun (field : Field) _ ->
                       (field.Menu, field.ShopOpt, field.Inventory))
  
positive.code:                          Entity.UpImage == Assets.Gui.ButtonBigUpImage
                           Entity.DownImage == Assets.Gui.ButtonBigDownImage
                           Entity.ClickEvent ==> msg (fieldMsg i)])
  
          override this.Channel (_, field) =
              [Simulants.Field.Scene.Avatar.Avatar.ChangeEvent =|> fun evt -> msg (UpdateAvatar (evt.Data.Value :?> Avatar))
  
negative.code:             Seq.indexed |>
              Map.ofSeq
  
          let sidebar position elevation (field : Lens<Field, World>) =
              Content.association Gen.name []
                  [Content.button Gen.name
                     [Entity.PositionLocal == position; Entity.ElevationLocal == elevation; Entity.Size == v2 72.0f 72.0f
  