     channel        = revive channel
     listController = @getListController channel.typeConstant
     listController.addItem channel
+    @updateTopicFollowButtons channel
 
 
   removeFromChannel: (channel) ->

      else {}

    return section.listController


  # fixme:

    listController = @getListController channel.typeConstant
    item           = listController.itemForId channel.getId()
    listController.removeItem item
    @updateTopicFollowButtons channel


  notificationHasArrived: (update) ->
