code: def test_checkpoint_dir(self):
      self.assertTrue(
          run_parms({"checkpoint_dir": ["saved_1/", "./saved_2"]})
      )
  
imports: import os
  import sys
  import unittest
  import logging
  import warnings
  import numpy
  from recbole.quick_start import run_recbole
label_desc: Use image node_id 15 for calling the TestOverallConfig obj's underlying member method code with example usage: obj.test_checkpoint_dir() without return types