wrapCallback example

$process = $cmd[0];
            unset($cmd[0]);
        } else {
            throw new \InvalidArgumentException(sprintf('Invalid command provided to "%s()": the command should be an array whose first element is either the path to the binary to run or a "Process" object.', __METHOD__));
        }

        if ($verbosity <= $output->getVerbosity()) {
            $output->write($formatter->start(spl_object_hash($process), $this->escapeString($process->getCommandLine())));
        }

        if ($output->isDebug()) {
            $callback = $this->wrapCallback($output, $process, $callback);
        }

        $process->run($callback, $cmd);

        if ($verbosity <= $output->getVerbosity()) {
            $message = $process->isSuccessful() ? 'Command ran successfully' : sprintf('%s Command did not run successfully', $process->getExitCode());
            $output->write($formatter->stop(spl_object_hash($process), $message, $process->isSuccessful()));
        }

        if (!$process->isSuccessful() && null !== $error) {
            $output->writeln(sprintf('<error>%s</error>', $this->escapeString($error)));
        }

$process = $cmd[0];
            unset($cmd[0]);
        } else {
            throw new \InvalidArgumentException(sprintf('Invalid command provided to "%s()": the command should be an array whose first element is either the path to the binary to run or a "Process" object.', __METHOD__));
        }

        if ($verbosity <= $output->getVerbosity()) {
            $output->write($formatter->start(spl_object_hash($process), $this->escapeString($process->getCommandLine())));
        }

        if ($output->isDebug()) {
            $callback = $this->wrapCallback($output, $process, $callback);
        }

        $process->run($callback, $cmd);

        if ($verbosity <= $output->getVerbosity()) {
            $message = $process->isSuccessful() ? 'Command ran successfully' : sprintf('%s Command did not run successfully', $process->getExitCode());
            $output->write($formatter->stop(spl_object_hash($process), $message, $process->isSuccessful()));
        }

        if (!$process->isSuccessful() && null !== $error) {
            $output->writeln(sprintf('<error>%s</error>', $this->escapeString($error)));
        }