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-rw-r--r--synapse/handlers/sync.py10
1 files changed, 6 insertions, 4 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index 7b356ba7e5..ff11266c67 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -252,13 +252,13 @@ class SyncHandler:
         self.storage = hs.get_storage()
         self.state_store = self.storage.state
 
-        # ExpiringCache((User, Device)) -> LruCache(state_key => event_id)
+        # ExpiringCache((User, Device)) -> LruCache(user_id => event_id)
         self.lazy_loaded_members_cache = ExpiringCache(
             "lazy_loaded_members_cache",
             self.clock,
             max_len=0,
             expiry_ms=LAZY_LOADED_MEMBERS_CACHE_MAX_AGE,
-        )
+        )  # type: ExpiringCache[Tuple[str, Optional[str]], LruCache[str, str]]
 
     async def wait_for_sync_for_user(
         self,
@@ -733,8 +733,10 @@ class SyncHandler:
 
     def get_lazy_loaded_members_cache(
         self, cache_key: Tuple[str, Optional[str]]
-    ) -> LruCache:
-        cache = self.lazy_loaded_members_cache.get(cache_key)
+    ) -> LruCache[str, str]:
+        cache = self.lazy_loaded_members_cache.get(
+            cache_key
+        )  # type: Optional[LruCache[str, str]]
         if cache is None:
             logger.debug("creating LruCache for %r", cache_key)
             cache = LruCache(LAZY_LOADED_MEMBERS_CACHE_MAX_SIZE)