--- a/mercurial/manifest.py	Mon Sep 24 09:37:19 2018 -0700
+++ b/mercurial/manifest.py	Thu Sep 20 19:20:01 2018 -0700
@@ -1569,6 +1569,9 @@
         return self._revlog.addgroup(deltas, linkmapper, transaction,
                                      addrevisioncb=addrevisioncb)
 
+    def rawsize(self, rev):
+        return self._revlog.rawsize(rev)
+
     def getstrippoint(self, minlink):
         return self._revlog.getstrippoint(minlink)