anchor.diff:      return if nodes[0] is @selectedNode and nodes.length is 1
       nodes.unshift(@selectedNode)
   
  -    nodes = nodes[0...@nodesToShow] if nodes.length > @nodesToShow
  +    nodes = nodes[0...@nodeCount] if nodes.length > @nodeCount
       for node in nodes
         @sys.addNode(node.id, node.data) unless @nodes[node.id]
         @nodes[node.id] = node
  
positive.code:   setFilter: (filter) ->
      @filter = if filter then new RegExp(filter, 'i') else null
  
    setNodesToShow: (n) ->
      @nodesToShow = n
  
    addNodes: (nodes) ->
      return if nodes.length == 0
  
negative.code: 
  initEventSubscribers = (eventBroker, appContext, space, renderer) ->
    eventBroker.subscribe('nodeCountChanged', ->
      space.setNodeCount appContext.getNodeCount()
    )
  
    eventBroker.subscribe('nodeFilterChanged', ->
  