src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/NotImplementedException.java

@@ -25,7 +25,8 @@
 
 package sun.reflect.generics.reflectiveObjects;
 
 /** Temporary class used to indicate missing functionality */
 public class NotImplementedException extends RuntimeException {
+    @java.io.Serial
     private static final long serialVersionUID = -9177857708926624790L;
 }