Copilot commented on code in PR #20574:
URL: https://github.com/apache/kafka/pull/20574#discussion_r2371934925


##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/streams/StreamsTopology.java:
##########
@@ -95,4 +97,42 @@ public static StreamsTopology 
fromHeartbeatRequest(StreamsGroupHeartbeatRequestD
             
.collect(Collectors.toMap(StreamsGroupTopologyValue.Subtopology::subtopologyId, 
x -> x));
         return new StreamsTopology(topology.epoch(), subtopologyMap);
     }
+
+    public StreamsGroupDescribeResponseData.Topology 
asStreamsGroupDescribeTopology() {
+        return new StreamsGroupDescribeResponseData.Topology()
+            .setEpoch(topologyEpoch)
+            .setSubtopologies(
+                subtopologies.entrySet().stream().map(
+                    entry -> asStreamsGroupDescribeSubtopology(entry.getKey(), 
entry.getValue())
+                ).toList()

Review Comment:
   The subtopologies should be sorted by subtopology ID to ensure consistent 
ordering in the response, similar to how the test expects sorted subtopologies.
   ```suggestion
                   subtopologies.entrySet().stream()
                       .sorted(Map.Entry.comparingByKey())
                       .map(entry -> 
asStreamsGroupDescribeSubtopology(entry.getKey(), entry.getValue()))
                       .toList()
   ```



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