   remove: ( thingy ) ->
     @group().destroy()
     @draw_layer()
-    @zindex().unregister( thingy )
+    @__kt.zindex.unregister( thingy )
 
   # Accessor methods.  Do not override.
 


  # ZIndex
  # @return [Oghma.ZIndex] ZIndex participating in.
  zinder: -> @__kt.zindex

  # Thingy
  # @return [Oghma.Thingy] Thingy delegate for.

  # True if locked.
  # @return [bool] True if locked.
  locked:       -> @__kt.thingy.gets( 'locked' )

  default_thingy_methods = [
    'redraw',
