code: def test_training_gradient_checkpointing(self):
      pass
  
imports: import inspect
  import tempfile
  import unittest
  import numpy
  from huggingface_hub import hf_hub_download
  from transformers import is_torch_available
  from transformers.testing_utils import is_flaky, require_torch, slow, torch_device
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, floats_tensor, ids_tensor
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 9 for calling the InformerModelTest obj's underlying member method code with example usage: obj.test_training_gradient_checkpointing() without return types