--- old/src/share/vm/oops/fieldStreams.hpp	2017-09-14 10:45:50.000000000 -0400
+++ new/src/share/vm/oops/fieldStreams.hpp	2017-09-14 10:45:50.000000000 -0400
@@ -161,6 +161,14 @@
     return field()->allocation_type();
   }
 
+  bool is_flatten() {
+    return field()->is_flatten();
+  }
+
+  void set_flattening(bool b) {
+    field()->set_flattening(b);
+  }
+
   void set_offset(int offset) {
     field()->set_offset(offset);
   }