# File lib_ctrl/rucy/params.rb, line 508
    def stdout_logging_level=(new_level)
      case (new_level)
      when 'emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug'
        # nothing to do.
      else
        raise "not allowed logging level: #{new_level.inspect}"
      end
      @params['stdout_logging_level'] = new_level
    end