 
   removedPaneItem: (item) ->
     @itemRegistry.removeItem(item)
-
-if Grim.includeDeprecatedAPIs
-  PaneContainer.properties
-    activePane: null
-
-  PaneContainer.behavior 'activePaneItem', ->
-    @$activePane
-      .switch((activePane) -> activePane?.$activeItem)
-      .distinctUntilChanged()

  constructor: (params) ->
    super

    unless Grim.includeDeprecatedAPIs
      @activePane = params?.activePane

    @emitter = new Emitter
    @subscriptions = new CompositeDisposable

{find, flatten} = require 'underscore-plus'
{Emitter, CompositeDisposable} = require 'event-kit'
Serializable = require 'serializable'
Gutter = require './gutter'
