--- old/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/BaseConfiguration.java	2019-10-30 16:23:54.495748296 -0700
+++ new/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/BaseConfiguration.java	2019-10-30 16:23:54.131748309 -0700
@@ -26,13 +26,14 @@
 package jdk.javadoc.internal.doclets.toolkit;
 
 import java.io.*;
+import java.lang.ref.*;
 import java.util.*;
 
 import javax.lang.model.element.Element;
 import javax.lang.model.element.ModuleElement;
 import javax.lang.model.element.PackageElement;
 import javax.lang.model.element.TypeElement;
-import javax.lang.model.util.SimpleElementVisitor9;
+import javax.lang.model.util.SimpleElementVisitor14;
 import javax.tools.JavaFileManager;
 import javax.tools.JavaFileObject;
 
@@ -1222,6 +1223,7 @@
      * Splits the elements in a collection to its individual
      * collection.
      */
+    @SuppressWarnings("preview")
     static private class Splitter {
 
         final Set<ModuleElement> mset = new LinkedHashSet<>();
@@ -1235,7 +1237,7 @@
                     : docEnv.getSpecifiedElements();
 
             for (Element e : inset) {
-                new SimpleElementVisitor9<Void, Void>() {
+                new SimpleElementVisitor14<Void, Void>() {
                     @Override
                     @DefinedBy(Api.LANGUAGE_MODEL)
                     public Void visitModule(ModuleElement e, Void p) {