code: def test_with_time(self):
      num_epochs = 30
      pauses = [5, 18, 26]
      target = [(e, 0) for e in pauses]
      checkpointer = Checkpointer(
          serialization_dir=self.TEST_DIR,
          save_completed_epochs=False,
          save_every_num_seconds=1,
          keep_most_recent_by_count=3,
      )
      for e in range(num_epochs):
          if e in pauses:
              time.sleep(2)
          state = {
              "epochs_completed": e,
              "batches_in_epoch_completed": 0,
          }
          checkpointer.maybe_save_checkpoint(
              trainer=FakeTrainer(
                  model_state=state, training_state=state
              ),
              num_epochs_completed=e,
              num_batches_in_epoch_completed=0,
          )
      models, training = self.retrieve_and_delete_saved()
      assert models == training == target
  
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 4 for calling the TestCheckpointer obj's underlying member method code with example usage: obj.test_with_time() without return types