--- a/src/hotspot/share/gc/z/zDirector.hpp	Wed May 22 21:49:31 2019 -0700
+++ b/src/hotspot/share/gc/z/zDirector.hpp	Thu May 23 08:09:29 2019 +0200
@@ -43,6 +43,7 @@
   bool rule_warmup() const;
   bool rule_allocation_rate() const;
   bool rule_proactive() const;
+  bool rule_high_usage() const;
   GCCause::Cause make_gc_decision() const;
 
 protected: