public function progressAdvance($step = 1)
{
if ($this->output->isDecorated() && $step > 0) {
$stepTime = (time() - $this->progressBar->getStartTime()) / $step;
if ($stepTime > 0 && $stepTime < 1) {
$this->progressBar->setRedrawFrequency(1 / $stepTime);
} else {
$this->progressBar->setRedrawFrequency(1);
}
}
$this->progressBar->setProgress($this->progressBar->getProgress() + $step);
}