/resources/product_link.proto

--- v15/resources/product_link.proto    2024-02-20 20:29:00.000000000 +0000
+++ v16/resources/product_link.proto    2024-02-20 20:29:04.000000000 +0000
@@ -70,6 +70,10 @@
     // Immutable. Google Merchant Center link.
     MerchantCenterIdentifier merchant_center = 12
         [(google.api.field_behavior) = IMMUTABLE];
+
+    // Output only. Advertising Partner link.
+    AdvertisingPartnerIdentifier advertising_partner = 13
+        [(google.api.field_behavior) = OUTPUT_ONLY];
   }
 }

@@ -105,3 +109,17 @@
   optional int64 merchant_center_id = 1
       [(google.api.field_behavior) = IMMUTABLE];
 }
+
+// The identifier for the Advertising Partner Google Ads account.
+message AdvertisingPartnerIdentifier {
+  // Output only. The resource name of the advertising partner Google Ads
+  // account. This field is required and should not be empty when creating a new
+  // Advertising Partner link. It is unable to be modified after the creation of
+  // the link.
+  optional string customer = 1 [
+    (google.api.field_behavior) = OUTPUT_ONLY,
+    (google.api.resource_reference) = {
+      type: "googleads.googleapis.com/Customer"
+    }
+  ];
+}