private function setup_transaction_id()
{
$transaction_id = $this->get_meta('_give_payment_transaction_id', true);
if (empty($transaction_id) || (int) $transaction_id === (int) $this->ID) {
$gateway = $this->gateway;
$transaction_id = apply_filters('give_get_payment_transaction_id-' . $gateway, $this->ID);
}
return $transaction_id;
}