diff -r 64387cd2bf4d -r bbe71b5afd02 mercurial/repository.py
--- a/mercurial/repository.py	Wed Aug 07 21:17:48 2019 +0200
+++ b/mercurial/repository.py	Wed Aug 07 22:02:49 2019 +0200
@@ -597,6 +597,10 @@
         consumers should use ``read()`` to obtain the actual file data.
         """
 
+    def rawdata(node):
+        """Obtain raw data for a node.
+        """
+
     def read(node):
         """Resolve file fulltext data.