--- a/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.hpp	Sun Aug 25 13:27:54 2019 +0200
+++ b/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.hpp	Sun Aug 25 15:13:16 2019 +0200
@@ -95,6 +95,7 @@
 
  public:
   void register_service_thread(const Thread* t);
+  bool is_type_set_checkpoint_required() const;
   size_t flush_type_set();
   static void write_type_set_for_unloaded_classes();
   static void create_thread_checkpoint(Thread* t);