From 5df082132dbb2881d600e002d5dfe4ba8f31a9a1 Mon Sep 17 00:00:00 2001
From: Sam Brannen <104798+sbrannen@users.noreply.github.com>
Date: Thu, 25 Sep 2025 10:28:00 +0200
Subject: [PATCH] Polish contribution

See gh-35535
---
 .../org/springframework/util/LinkedCaseInsensitiveMap.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spring-core/src/main/java/org/springframework/util/LinkedCaseInsensitiveMap.java b/spring-core/src/main/java/org/springframework/util/LinkedCaseInsensitiveMap.java
index 38f8b6873d4..02c60c1201b 100644
--- a/spring-core/src/main/java/org/springframework/util/LinkedCaseInsensitiveMap.java
+++ b/spring-core/src/main/java/org/springframework/util/LinkedCaseInsensitiveMap.java
@@ -16,6 +16,7 @@
 
 package org.springframework.util;
 
+import java.io.Serial;
 import java.io.Serializable;
 import java.util.AbstractCollection;
 import java.util.AbstractSet;
@@ -49,8 +50,10 @@ import org.jspecify.annotations.Nullable;
  */
 public class LinkedCaseInsensitiveMap<V> implements Map<String, V>, Serializable, Cloneable {
 
+	@Serial
 	private static final long serialVersionUID = -1797561627545787622L;
 
+
 	private final LinkedHashMap<String, V> targetMap;
 
 	private final HashMap<String, String> caseInsensitiveKeys;