--- old/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java	2020-03-30 11:59:59.000000000 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java	2020-03-30 11:59:58.000000000 -0700
@@ -169,6 +169,14 @@
         return compareTo(JDK1_11) >= 0;
     }
 
+    /** language runtime uses nest-based access.
+     *  e.g. lambda and string concat spin dynamic proxy class as a nestmate
+     *  of the target class
+     */
+    public boolean runtimeUseNestAccess() {
+        return compareTo(JDK1_15) >= 0;
+    }
+
     /** Does the target VM support virtual private invocations?
      */
     public boolean hasVirtualPrivateInvoke() {