diff -r b65f39791f92 -r 85390446f8c1 hgext3rd/topic/constants.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hgext3rd/topic/constants.py	Thu Mar 17 09:12:18 2016 -0700
@@ -0,0 +1,1 @@
+extrakey = 'topic'