--- old/src/hotspot/share/gc/z/zHeap.hpp	2020-04-27 10:20:19.587899190 +0200
+++ new/src/hotspot/share/gc/z/zHeap.hpp	2020-04-27 10:20:19.395896065 +0200
@@ -105,6 +105,7 @@
   void set_boost_worker_threads(bool boost);
   void worker_threads_do(ThreadClosure* tc) const;
   void print_worker_threads_on(outputStream* st) const;
+  void run_task(AbstractGangTask* task);
 
   // Reference processing
   ReferenceDiscoverer* reference_discoverer();