def open_folders(folder_paths)
      model.each do |model, path, iter| 
        if folder_paths.include?(iter[id(:path)])
          fill_folder(iter)
#          expand_row(path, false)
#          self__row_expanded(self, iter, path)    
        end
      end
    end
def open_folders(folder_paths)
      model.each do |model, path, iter| 
        if folder_paths.include?(iter[id(:path)])
          fill_folder(iter)
#          expand_row(path, false)
#          self__row_expanded(self, iter, path)    
        end
      end
    end
Opens a list of folders.
 @param [Array] folder_paths Array of Strings of folder names to expand, possibly from the #get_open_folders method.