when i run the "Centralized Simulation Training Script" in iot i meet this bug <img width="973" alt="1667305814522" src="https://user-images.githubusercontent.com/49614027/199232638-f589d2ce-f986-47f9-bffd-10336067cd67.png"> and i found the code in FedAVGAggregator.py is: <img width="501" alt="1667305931587(1)" src="https://user-images.githubusercontent.com/49614027/199233127-39e97414-a213-4712-89d4-a0cfa9a1454f.png"> and the aggregator.test function is not defined in fed_detect_aggregator.py: <img width="318" alt="1667305876955" src="https://user-images.githubusercontent.com/49614027/199232961-2def972f-8bf6-4668-b3d1-62ffb9942636.png"> How can i do the simulation?