chia7712 commented on code in PR #19069:
URL: https://github.com/apache/kafka/pull/19069#discussion_r1992038764
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metadata/src/test/java/org/apache/kafka/metadata/ControllerRegistrationTest.java:
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@@ -46,18 +44,18 @@ static <K, V> Map<K, V> doubleMap(K k1, V v1, K k2, V v2) {
HashMap<K, V> map = new HashMap<>();
map.put(k1, v1);
map.put(k2, v2);
- return Collections.unmodifiableMap(map);
+ return map;
Review Comment:
Could you please use `Map.of` to replace this helper method `doubleMap`?
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