/**
* @param string $externalId User provided customer id (not used by purchased.at).
* @return Customer
*/
public function setExternalId($externalId)
{
if (!is_null($externalId)) {
Preconditions::checkStringNonEmpty($externalId, 'externalId');
}
$this->externalId = $externalId;
return $this;
}
/**
* @param string $notification The API URL to post transaction status changes to.
* @return Response
*/
public function setNotification($notification)
{
if (!is_null($notification)) {
Preconditions::checkStringNonEmpty($notification, 'notification');
}
$this->notification = $notification;
return $this;
}
/**
* @param string $itemSku Preselect the specified item in purchase dialog by SKU.
* @return Select
*/
public function setItemSku($itemSku)
{
if (!is_null($itemSku)) {
Preconditions::checkStringNonEmpty($itemSku, 'itemSku');
}
$this->itemSku = $itemSku;
return $this;
}
/**
* @param string $sdk
* @return $this
*/
public function setSdk($sdk)
{
Preconditions::checkStringNonEmpty($sdk, 'sdk');
$this->sdk = $sdk;
return $this;
}
/**
* @param $lang string ISO2 language code
* @param $name string name of item in specified language
* @return $this
*/
public function addName($lang, $name)
{
Preconditions::checkIso2Language($lang, 'lang');
Preconditions::checkStringNonEmpty($name, 'name');
$this->name[$lang] = $name;
return $this;
}
