--- old/src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/NotImplementedException.java	2019-08-27 17:29:37.910324386 -0700
+++ new/src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/NotImplementedException.java	2019-08-27 17:29:37.706324386 -0700
@@ -27,5 +27,6 @@
 
 /** Temporary class used to indicate missing functionality */
 public class NotImplementedException extends RuntimeException {
+    @java.io.Serial
     private static final long serialVersionUID = -9177857708926624790L;
 }