code: def setUp(self):
      self.mmf_tensorboard_logs = []
      self.lightning_tensorboard_logs = []
  
file_path: mmf/tests/trainers/lightning/test_logging.py
imports: import unittest
  from unittest.mock import MagicMock, patch
  from mmf.trainers.callbacks.logistics import LogisticsCallback
  from mmf.trainers.lightning_core.loop_callback import LightningLoopCallback
  from mmf.utils.timer import Timer
  from tests.test_utils import skip_if_no_network
  from tests.trainers.test_utils import get_config_with_defaults, get_lightning_trainer, get_mmf_trainer, run_lightning_trainer
label_desc: Use image node_id 1 for calling the TestLightningTrainerLogging obj's underlying member method code with example usage: obj.setUp() without return types