code: def test_zero_cfs(
      self,
      desired_class,
      desired_range,
      sample_custom_query_4,
      total_CFs,
  ):
      self.exp_regr._generate_counterfactuals(
          query_instance=sample_custom_query_4,
          total_CFs=total_CFs,
          desired_range=desired_range,
      )
  
imports: import numpy
  import pytest
  from dice_ml.counterfactual_explanations import CounterfactualExplanations
  from dice_ml.diverse_counterfactuals import CounterfactualExamples
label_desc: Use image node_id 4 for calling the TestDiceKDRegressionMethods obj's underlying member method code with example usage: obj.test_zero_cfs(desired_class, desired_range, sample_custom_query_4, total_CFs) without return types