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-rw-r--r--synapse/storage/stream.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index 200d124632..dddd5fc0e7 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -829,3 +829,6 @@ class StreamStore(SQLBaseStore):
             updatevalues={"stream_id": stream_id},
             desc="update_federation_out_pos",
         )
+
+    def has_room_changed_since(self, room_id, stream_id):
+        return self._events_stream_cache.has_entity_changed(room_id, stream_id)