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    my ( $in, $out, $timer );
    $logger->debug("Calling start ..");
...
    $$self{_in}    = \$in;
    $$self{_out}   = \$out;
    $$self{_timer} = \$timer;

    $$self{_in} .= $thisLine . "\n";
    $$self{_h}->pump_nb;