public function iterationStart(Iteration $iteration)
{
$this->output->write(PHP_EOL);
$this->output->write(PHP_EOL);
$this->output->write(sprintf('<info>it</info>%3d/%-3d<info> (rej </info>%s<info>)</info>', $iteration->getIndex(), $iteration->getVariant()->count(), $iteration->getVariant()->getRejectCount()));
$this->output->write("[2A");
$this->output->write("[0G");
}