--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/HeapRegion.java	2018-11-19 17:23:09.519374200 -0800
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/HeapRegion.java	2018-11-19 17:23:08.611810800 -0800
@@ -122,6 +122,10 @@
         return type.isOld();
     }
 
+    public boolean isPreMatureOld() {
+        return type.isPreMatureOld();
+    }
+
     public static long getPointerSize() {
         return pointerSize;
     }