From b214a04ffc1200535f1d9c6ec45717cd266f36e5 Mon Sep 17 00:00:00 2001
From: Luke Barnard <luke@matrix.org>
Date: Thu, 5 Apr 2018 13:29:16 +0100
Subject: [PATCH] Document set_group_join_policy

---
 synapse/storage/group_server.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index db66ea1eb0..ab4f710f7d 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -31,6 +31,12 @@ _DEFAULT_ROLE_ID = ""
 
 class GroupServerStore(SQLBaseStore):
     def set_group_join_policy(self, group_id, join_policy):
+        """Set the join policy of a group.
+
+        join_policy can be one of:
+         * "invite"
+         * "open"
+        """
         return self._simple_update_one(
             table="groups",
             keyvalues={