code: def test_not_started_exception(self, experiment):
      logger = self.logger
      with self.assertRaises(KeyError):
          logger.log_trial_end(self.trials[0])
  
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 2 for calling the LogTrialEndTests obj's underlying member method code with example usage: obj.test_not_started_exception(experiment) without return types