def auto_flushing=(period)
      @auto_flushing =
        case period
        when true;                1
        when false, nil, 0;       MAX_BUFFER_SIZE
        when Integer;             period
        else raise ArgumentError, "Unrecognized auto_flushing period: #{period.inspect}"
        end
    end
def auto_flushing=(period)
      @auto_flushing =
        case period
        when true;                1
        when false, nil, 0;       MAX_BUFFER_SIZE
        when Integer;             period
        else raise ArgumentError, "Unrecognized auto_flushing period: #{period.inspect}"
        end
    end
Set the auto-flush period. Set to true to flush after every log message,
 to an integer to flush every N messages, or to false, nil, or zero to
 never auto-flush. If you turn auto-flushing off, be sure to regularly
 flush the log yourself -- it will eat up memory until you do.