64     private $exitcode;  variable in Symfony\\Component\\Process\\Process
445         return $this->exitcode;
756         return $this->exitcode;
772         if (null === $exitcode = $this->getExitCode()) {
776         return self::$exitCodes[$exitcode] ?? 'Unknown error';
944         return $this->exitcode;
1462         $this->exitcode = $this->processInformation['exitcode'];
1465         if (-1 === $this->exitcode) {
1468                 $this->exitcode = 128 + $this->processInformation['termsig'];
1480         return $this->exitcode;
1490         $this->exitcode = null;