code: def _get_trial_dir(self, absoulte_exp_dir):
      print("looking for", self.MockTrainable._name)
      print("in", os.listdir(absoulte_exp_dir))
      trial_dirname = next(
          (
              child_dir
              for child_dir in os.listdir(absoulte_exp_dir)
              if (
                  os.path.isdir(
                      os.path.join(absoulte_exp_dir, child_dir)
                  )
                  and child_dir.startswith(self.MockTrainable._name)
              )
          )
      )
  
      trial_absolute_dir = os.path.join(absoulte_exp_dir, trial_dirname)
  
      return trial_dirname, trial_absolute_dir
  
imports: import os
  import pickle
  import shutil
  import tempfile
  import unittest
  import pytest
  import ray
  from ray import tune
  from ray.train import CheckpointConfig
  from ray.tune import Trainable
  from ray.tune.utils import validate_save_restore
label_desc: Use image node_id 4 for calling the SerialTuneRelativeLocalDirTest obj's underlying member method code with example usage: obj._get_trial_dir(absoulte_exp_dir) and returns: trial_dirname,  trial_absolute_dir