private function removeIssues(InputInterface $input)
{
$this->refreshJournal($input);
$journalIssues = $this->em->getRepository('OjsJournalBundle:Issue')->findBy(['journal' => $this->journal]);
$this->io->progressStart(count($journalIssues));
foreach ($journalIssues as $issue) {
$this->io->progressAdvance();
$this->em->remove($issue);
}
$this->em->flush();
}