code: def test_success_trial_get_validation_score(self):
      self._given_success_trial_validation_split(
          self.trial, best_score=0.3
      )
  
      validation_score = self.trial.get_avg_validation_score(
          SOME_OTHER_METRIC_NAME_MSE
      )
  
      assert validation_score == 0.3
  
imports: import copy
  import datetime
  import json
  from neuraxle.base import TrialStatus
  from neuraxle.hyperparams.space import HyperparameterSamples
  from neuraxle.logging.logging import LOGGING_DATETIME_STR_FORMAT
  from neuraxle.metaopt.context import AutoMLContext
  from neuraxle.metaopt.data.aggregates import MetricResults, Round, Trial, TrialSplit
  from neuraxle.metaopt.data.vanilla import ClientDataclass, MetricResultsDataclass, RoundDataclass, ScopedLocation, TrialDataclass, to_json
  from testing_neuraxle.metaopt.test_automl_dataclasses import SOME_FULL_SCOPED_LOCATION, SOME_ROOT_DATACLASS, SOME_TRIAL_DATACLASS
label_desc: Use image node_id 9 for calling the TestTrials obj's underlying member method code with example usage: obj.test_success_trial_get_validation_score() without return types