     @reportChanges()
 
   onAddComponentEnterPressed: (node) =>
-    extantSystems = 
+    extantSystems =
       (@supermodel.getModelByOriginalAndMajorVersion LevelSystem, sn.original, sn.majorVersion).attributes.name.toLowerCase() for idx, sn of @level.get('systems')
     requireSystem = node.data.system.toLowerCase()
 

  render: =>
    return if @destroyed
    for model in [Level, LevelComponent]
      (new model()).on 'schema-loaded', @render unless model.schema?.loaded
    if not @componentCollection
      @componentCollection = @supermodel.getCollection new ComponentsCollection()
    unless @componentCollection.loaded


    toRemoveTreema = []
    dependent_class = 'treema-dependent'
    try
      for index, child of @extantComponentsTreema.childrenTreemas
        $(child.$el).removeClass(dependent_class)

