/resources/asset.proto 

--- v18/resources/asset.proto   2025-08-05 14:36:06.000000000 +0000
+++ v19/resources/asset.proto   2025-08-05 14:36:19.000000000 +0000
@@ -183,17 +183,25 @@
         35;

     // A dynamic local asset.
-    google.ads.googleads.v18.common.DynamicLocalAsset dynamic_local_asset = 36;
+    google.ads.googleads.v19.common.DynamicLocalAsset dynamic_local_asset = 36;

     // A dynamic jobs asset.
-    google.ads.googleads.v18.common.DynamicJobsAsset dynamic_jobs_asset = 37;
+    google.ads.googleads.v19.common.DynamicJobsAsset dynamic_jobs_asset = 37;

     // Output only. A location asset.
-    google.ads.googleads.v18.common.LocationAsset location_asset = 39
+    google.ads.googleads.v19.common.LocationAsset location_asset = 39
         [(google.api.field_behavior) = OUTPUT_ONLY];

     // Immutable. A hotel property asset.
-    google.ads.googleads.v18.common.HotelPropertyAsset hotel_property_asset = 41
+    google.ads.googleads.v19.common.HotelPropertyAsset hotel_property_asset = 41
+        [(google.api.field_behavior) = IMMUTABLE];
+
+    // A business message asset.
+    google.ads.googleads.v19.common.BusinessMessageAsset
+        business_message_asset = 51;
+
+    // Immutable. An app deep link asset.
+    google.ads.googleads.v19.common.AppDeepLinkAsset app_deep_link_asset = 52
         [(google.api.field_behavior) = IMMUTABLE];
   }
 }