diff -r 9170826a3d76 -r eb3e2a5c2bcd src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java
--- a/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java	Tue Nov 26 15:21:37 2019 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java	Tue Nov 26 17:00:57 2019 +0100
@@ -292,4 +292,8 @@
     static long headerSize() {
         return HEADER_SIZE;
     }
+
+    public long getLastNanos() {
+        return getStartNanos() + getDurationNanos();
+    }
 }