Properties specific to an Advertising Partner link.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/resources/product_link.proto)

| Fields ||
|---|---|
| ## `allowed_domain` | `string` Output only. The allowed domain for the Advertising Partner link. The advertising partner will only be able to advertise on this domain. The field is immutable. |