diff -r c90ea9bbf327 -r 32837c7e2e4b mercurial/interfaces/repository.py
--- a/mercurial/interfaces/repository.py	Mon May 29 04:26:39 2023 +0200
+++ b/mercurial/interfaces/repository.py	Sun May 28 05:23:46 2023 +0200
@@ -1404,6 +1404,14 @@
         This one behaves the same way, except for manifest data.
         """
 
+    def get_revlog():
+        """return an actual revlog instance if any
+
+        This exist because a lot of code leverage the fact the underlying
+        storage is a revlog for optimization, so giving simple way to access
+        the revlog instance helps such code.
+        """
+
 
 class imanifestlog(interfaceutil.Interface):
     """Interface representing a collection of manifest snapshots.