--- a/mercurial/bundle2.py	Fri Dec 20 21:14:30 2024 -0500
+++ b/mercurial/bundle2.py	Sat Dec 21 17:43:38 2024 -0500
@@ -869,7 +869,9 @@
             params = self._processallparams(params)
         return params
 
-    def _processallparams(self, paramsblock):
+    def _processallparams(
+        self, paramsblock: bytes
+    ) -> util.sortdict[bytes, bytes]:
         """ """
         params = util.sortdict()
         for p in paramsblock.split(b' '):