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

*** 25,31 ****
--- 25,32 ----
  
  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;
  }