diff -r f63299ee7e4d -r 45f0d5297698 mercurial/manifest.py
--- a/mercurial/manifest.py	Wed Mar 10 19:33:18 2021 +0100
+++ b/mercurial/manifest.py	Fri Feb 19 11:15:42 2021 +0100
@@ -1826,6 +1826,7 @@
         revisiondata=False,
         assumehaveparentrevisions=False,
         deltamode=repository.CG_DELTAMODE_STD,
+        sidedata_helpers=None,
     ):
         return self._revlog.emitrevisions(
             nodes,
@@ -1833,6 +1834,7 @@
             revisiondata=revisiondata,
             assumehaveparentrevisions=assumehaveparentrevisions,
             deltamode=deltamode,
+            sidedata_helpers=sidedata_helpers,
         )
 
     def addgroup(