src/Subscriber/SymfonyConsoleProgress.php
public function start(Tick $tick)
    {
        if ($tick->getMessage()) {
            $this->output->writeln($tick->getMessage());
        }

        $this->progressBar = new ProgressBar(
            $this->output,
            $tick->getReport()->getTotalItemCount() > -1
                ? $tick->getReport()->getTotalItemCount()
                : 0
        );

        $this->progressBar->start();
    }
public function start(Tick $tick)
    {
        if ($tick->getMessage()) {
            $this->output->writeln($tick->getMessage());
        }

        $this->progressBar = new ProgressBar(
            $this->output,
            $tick->getReport()->getTotalItemCount() > -1
                ? $tick->getReport()->getTotalItemCount()
                : 0
        );

        $this->progressBar->start();
    }
Start callback

@param Tick $tick