code: def setUp(self):
      self.loggers = {
          "online": CometLoggerCallback(),
          "offline": CometLoggerCallback(online=False),
      }
  
      self.trial = MockTrial({"p1": 1}, "trial_1", 1, "artifact")
  
imports: import unittest
  from unittest.mock import patch
  from ray.air.integrations.comet import CometLoggerCallback
  from collections import namedtuple
label_desc: Use image node_id 1 for calling the OnlineVsOfflineTests obj's underlying member method code with example usage: obj.setUp() without return types