diff -r 14e098407bb0 -r ad69fd32778e src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java	Mon Oct 21 15:11:44 2019 +0200
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java	Mon Oct 21 15:38:26 2019 +0200
@@ -378,6 +378,10 @@
         return (flags_field & DEPRECATED_REMOVAL) != 0;
     }
 
+    public boolean isPreviewApi() {
+        return (flags_field & PREVIEW_API) != 0;
+    }
+
     public boolean isDeprecatableViaAnnotation() {
         switch (getKind()) {
             case LOCAL_VARIABLE: