--- old/src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp	2019-03-11 14:42:58.203644987 +0100
+++ new/src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp	2019-03-11 14:42:57.543634179 +0100
@@ -157,13 +157,12 @@
   // collection.
   virtual bool is_maximal_no_gc() const;
 
-  // Return true if the reference points to an object that
-  // can be moved in a partial collection.  For currently implemented
-  // generational collectors that means during a collection of
-  // the young gen.
-  virtual bool is_scavengable(oop obj);
   virtual void register_nmethod(nmethod* nm);
-  virtual void verify_nmethod(nmethod* nmethod);
+  virtual void unregister_nmethod(nmethod* nm);
+  virtual void verify_nmethod(nmethod* nm);
+  virtual void flush_nmethod(nmethod* nm);
+
+  void prune_nmethods();
 
   size_t max_capacity() const;