code: def test_base_class_from_params(self):
      Checkpointer.from_params(
          Params({}), serialization_dir=self.TEST_DIR
      )
  
file_path: allennlp/tests/training/checkpointer_test.py
imports: import os
  import time
  from typing import Optional
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.common.params import Params
  from allennlp.training import Checkpointer, Trainer
  from allennlp.training.trainer import TrainerCheckpoint
label_desc: Use image node_id 6 for calling the TestCheckpointer obj's underlying member method code with example usage: obj.test_base_class_from_params() without return types