/**
* Adding a payment to an invoice.
*
* @param string $id
* @param Payment $payment
* @return Payment
*/
public function invoicesAddPayment($id, Payment $payment)
{
$parameters['payment'] = $payment->toArray(true);
$rawData = $this->doCall('invoices/' . (string) $id . '/payments.json', $parameters, 'POST');
return Payment::initializeWithRawData($rawData);
}
