--- old/src/hotspot/share/gc/g1/heapRegionManager.hpp	2019-11-01 16:13:22.828400438 -0700
+++ new/src/hotspot/share/gc/g1/heapRegionManager.hpp	2019-11-01 16:13:22.552400429 -0700
@@ -192,6 +192,10 @@
     return _free_list.length();
   }
 
+  uint num_free_regions(uint node_index) const {
+    return _free_list.length(node_index);
+  }
+
   size_t total_free_bytes() const {
     return num_free_regions() * HeapRegion::GrainBytes;
   }