a = self._changectx.ancestor(other._changectx)       
         return (a.branch() == self._changectx.branch())
 
+    def children(self):
+        return bool(self._library._hgrepo.changelog.children(self.hgrev()))
+
     def merge_with(self, other, user, message):
         lock = self._library.lock(True)
         try: