Is it possible to hook into the CompletePurchaseRequest getTransactionReference() function?

[basepack]

Hi,

I have a use case where the user does not complete their payment and I need to check the previous payment if it is already fulfilled.
However I cannot give an trxid with the CompletePurchaseRequest because of this code:

    public function getTransactionReference()
    {
        return $this->httpRequest->query->get('trxid');
    }

This implementation does not work:

$gateway->completePurchase([ 'trxid' => 'TEST982374982700' ])->send();

So, it is hardcoded that the trxid comes from the request query parameters. Is it somehow possible to circumvent this?