--- old/src/java.compiler/share/classes/javax/lang/model/element/ModuleElement.java	2020-02-14 11:27:08.904933029 -0800
+++ new/src/java.compiler/share/classes/javax/lang/model/element/ModuleElement.java	2020-02-14 11:27:08.540933029 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -161,6 +161,24 @@
     interface Directive {
         /**
          * Returns the {@code kind} of this directive.
+         * <ul>
+         *
+         * <li> The kind of a {@linkplain RequiresDirective requires
+         * directive} is {@link DirectiveKind#REQUIRES REQUIRES}.
+         *
+         * <li> The kind of an {@linkplain ExportsDirective exports
+         * directive} is {@link DirectiveKind#EXPORTS EXPORTS}.
+         *
+         * <li> The kind of an {@linkplain OpensDirective opens
+         * directive} is {@link DirectiveKind#OPENS OPENS}.
+         *
+         * <li> The kind of a {@linkplain UsesDirective uses
+         * directive} is {@link DirectiveKind#USES USES}.
+         *
+         * <li> The kind of a {@linkplain ProvidesDirective provides
+         * directive} is {@link DirectiveKind#PROVIDES PROVIDES}.
+         *
+         * </ul>
          *
          * @return the kind of this directive
          */