def format_cell_value(value, attribute = nil)
      unless (ret_value = format_cell_value_as_ask(value)).nil?
        return ret_value
      end
      format_cell_value_as_type(value, attribute)
    end
def format_cell_value(value, attribute = nil)
      unless (ret_value = format_cell_value_as_ask(value)).nil?
        return ret_value
      end
      format_cell_value_as_type(value, attribute)
    end
Return the formated cell's value