/resources/experiment.proto

--- v15/resources/experiment.proto  2024-02-20 20:29:00.000000000 +0000
+++ v16/resources/experiment.proto  2024-02-20 20:29:04.000000000 +0000
@@ -105,6 +105,11 @@
       [(google.api.field_behavior) = OUTPUT_ONLY];

   // Output only. The status of the experiment promotion process.
-  google.ads.googleads.v15.enums.AsyncActionStatusEnum.AsyncActionStatus
+  google.ads.googleads.v16.enums.AsyncActionStatusEnum.AsyncActionStatus
       promote_status = 19 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Immutable. Set to true if changes to base campaigns should be synced to the
+  // trial campaigns. Any changes made directly to trial campaigns will be
+  // preserved. This field can only be set when the experiment is being created.
+  optional bool sync_enabled = 20 [(google.api.field_behavior) = IMMUTABLE];
 }