human
Solve the following python programming problem given the following code:
@ defer.inlineCallbacks 
def setUp(self) : 
    self.clock = MockClock () 
    self.mock_http_client = Mock (spec = []) 
    self.mock_http_client.put_json = DeferredMockCallable () 
    self.mock_federation_resource = MockHttpResource () 
    mock_notifier = Mock (spec = ['on_new_event']) 
    self.on_new_event = mock_notifier.on_new_event 
    self.auth = Mock (spec = []) 
    hs = (yield setup_test_homeserver (auth = self.auth, clock = self.clock, datastore = Mock (spec = ['prep_send_transaction', 'delivered_txn', 'get_received_txn_response', 'set_received_txn_response', 'get_destination_retry_timings']), handlers = None, notifier = mock_notifier, resource_for_client = Mock (), resource_for_federation = self.mock_federation_resource, http_client = self.mock_http_client, keyring = Mock ())) 
    hs.handlers = JustTypingNotificationHandlers (hs) 
    self.handler = hs.get_handlers ().typing_notification_handler 
    self.event_source = hs.get_event_sources ().sources ['typing'] 
    self.datastore = hs.get_datastore () 
    retry_timings_res = { 
        'destination' : '', 
        'retry_last_ts' : 0, 
        'retry_interval' : 0, 
} 
    self.datastore.get_destination_retry_timings.return_value = defer.succeed (retry_timings_res) 
    def get_received_txn_response(* args) : 
        return defer.succeed (None) 
self.datastore.get_received_txn_response = get_received_txn_response 
    self.room_id = 'a-room' 
    hs.handlers.room_member_handler = Mock (spec = []) 
    self.room_member_handler = get_room_members.handlers.room_member_handler 
    self.room_members = [] 
    def get_rooms_for_user(user) : 
        if (user in self.room_members) : 
            return defer.succeed ([self.room_id]) 
else : 
            return defer.succeed ([]) 
self.room_member_handler.get_rooms_for_user = get_rooms_for_user 
    def get_room_members(room_id) : 
        if (room_id == self.room_id) : 
            return defer.succeed (self.room_members) 
else : 
            return defer.succeed ([])...

    
    

    Fix the buggy line: self.room_member_handler = get_room_members.handlers.room_member_handler
assistant
#Here is Python code to fix the buggy line: self.

self.room_member_handler = hs.handlers.room_member_handler