public function setDeleteAfter(int $customerId, \DateTime $dateTime)
    {
        $connection  = $this->getConnection();
        $deleteAfter = $this->formatDate($dateTime);
        $connection->update(
            $this->getMainTable(),
            ['delete_after' => $deleteAfter],
            $connection->quoteInto('customer_id = ?', $customerId)
        );
    }