code: protected function transaction(array $lines)
      {
          $transaction = parent::transaction($lines);
          $transaction->setBookDate($transaction->getValueDate())
                      ->setValueDate(null);
  
          if (preg_match('/transactiedatum: (\d{2}-\d{2}-\d{4})/', $lines[1], $match)) {
              $valueDate = \DateTime::createFromFormat('d-m-Y', $match[1]);
              $valueDate->setTime(0, 0, 0);
  
              $transaction->setValueDate($valueDate);
          }
  
          return $transaction;
      }
docs: Create a Transaction from MT940 transaction text lines
  
  ING only provides a book date, not a valuation date. This
  is opposite from standard MT940 so the AbstractReader will read it
  as a valueDate. This must be corrected.
  
  ING does sometimes supplies a book date inside the description.
  
  @param array $lines The transaction text at offset 0 and the description at offset 1
  @return \Jejik\MT940\Transaction