Payment::setAvailablePaySystemsAction

public function setAvailablePaySystemsAction(BitrixSalePayment $payment, array $paySystemIds)
{
	$result = PaymentAvailablesPaySystems::setBindings($payment->getId(), $paySystemIds);	
	if ($errors = $result->getErrors())
	{
		$this->addErrors($errors);
		return null;
	}
	return true;
}