code: def test_empty_counterfactual_explanations_object(self, version):
      counterfactual_explanations = CounterfactualExplanations(
          cf_examples_list=[],
          local_importance=None,
          summary_importance=None,
          version=version,
      )
      self.verify_counterfactual_explanations(
          counterfactual_explanations, None, 0, version
      )
  
      counterfactual_explanations_as_json = (
          counterfactual_explanations.to_json()
      )
      assert counterfactual_explanations_as_json is not None
  
      recovered_counterfactual_explanations = (
          CounterfactualExplanations.from_json(
              counterfactual_explanations_as_json
          )
      )
  
      self.verify_counterfactual_explanations(
          recovered_counterfactual_explanations, None, 0, version
      )
  
      assert (
          counterfactual_explanations
          == recovered_counterfactual_explanations
      )
  
file_path: DiCE/tests/test_counterfactual_explanations.py
imports: import json
  import pytest
  from raiutils.exceptions import UserConfigValidationException
  from dice_ml.counterfactual_explanations import CounterfactualExplanations
label_desc: Use image node_id 6 for calling the TestSerializationCounterfactualExplanations obj's underlying member method code with example usage: obj.test_empty_counterfactual_explanations_object(version) without return types