public function getClassProperties()
    {
        return [
            'reference' => $this->getReference(),
            'bank_name' => $this->getBankName(),
            'account_holder' => $this->getAccountHolder(),
            'iban' => $this->getIban(),
            'bic' => $this->getBic(),
            'amount' => $this->getAmount(),
            'due_date' => $this->getDueDate(),
        ];
    }
public function getClassProperties()
    {
        return [
            'reference' => $this->getReference(),
            'bank_name' => $this->getBankName(),
            'account_holder' => $this->getAccountHolder(),
            'iban' => $this->getIban(),
            'bic' => $this->getBic(),
            'amount' => $this->getAmount(),
            'due_date' => $this->getDueDate(),
        ];
    }
{@inheritdoc}