code: def __init__(self, model_state, training_state):
      self._model_state = model_state
      self._training_state = training_state
  
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 1 to create a new FakeTrainer object from inherited base classes: Trainer with example: obj = FakeTrainer(model_state, training_state)