Ojs\UserBundle\Entity\User::getJournalRolesBag PHP Method

    public function getJournalRolesBag(Journal $journal = null)
    {
        if (!$journal) {
            return [];
        }
        $roles = [];
        $journalRoles = $this->getJournalRoles($journal);
        foreach ($journalRoles as $journalRole) {
            $roles[] = $journalRole[1]->getRole();
        }
        return $roles;
    }