dajac commented on code in PR #12853:
URL: https://github.com/apache/kafka/pull/12853#discussion_r1036297112


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -1618,34 +1618,36 @@ class KafkaApis(val requestChannel: RequestChannel,
 
   def handleListGroupsRequest(request: RequestChannel.Request): Unit = {
     val listGroupsRequest = request.body[ListGroupsRequest]
-    val states = if (listGroupsRequest.data.statesFilter == null)
-      // Handle a null array the same as empty
-      immutable.Set[String]()
-    else
-      listGroupsRequest.data.statesFilter.asScala.toSet
 
-    def createResponse(throttleMs: Int, groups: List[GroupOverview], error: 
Errors): AbstractResponse = {
-       new ListGroupsResponse(new ListGroupsResponseData()
-            .setErrorCode(error.code)
-            .setGroups(groups.map { group =>
-                val listedGroup = new ListGroupsResponseData.ListedGroup()
-                  .setGroupId(group.groupId)
-                  .setProtocolType(group.protocolType)
-                  .setGroupState(group.state)
-                listedGroup
-            }.asJava)
-            .setThrottleTimeMs(throttleMs)
-        )
+    def sendResponse(response: AbstractResponse): Unit = {
+      requestHelper.sendResponseMaybeThrottle(request, requestThrottleMs => {

Review Comment:
   Totally. Will do when that PR is merged.



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