# File gtk/sample/gtk-demo/editable_cells.rb, line 65
    def create_model
      # create array
      @articles = []

      add_items

      # create list store
      model = Gtk::ListStore.new(Integer, String, TrueClass)

      # add items
      @articles.each do |article|
        iter = model.append

        article.each_with_index do |value, index|
          iter.set_value(index, value)
        end
      end
      return model
    end