--- a/mercurial/extensions.st	Fri Feb 01 12:05:56 2013 +0000
+++ b/mercurial/extensions.st	Fri Feb 01 14:05:02 2013 +0000
@@ -457,6 +457,16 @@
     "Modified: / 27-11-2012 / 17:56:55 / Jan Vrany <jan.vrany@fit.cvut.cz>"
 ! !
 
+!Object methodsFor:'testing'!
+
+isHGChangeset
+    "Return true, if receiver is sort an Mercurial changeset."
+
+    ^false
+
+    "Created: / 01-02-2013 / 13:42:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
 !ProjectDefinition class methodsFor:'accessing - hg'!
 
 hgBinaryRevision