code: def load_model(self, model_json_file, model_wt_file):
      # read model json file
      with open(model_json_file, "r") as f:
          model = model_from_json(f.read())
  
      # read model weights file
      model.load_weights(model_wt_file)
  
      return model
  
file_path: AIX360/tests/contrastive/test_CEM.py
imports: import unittest
  import os
  import shutil
  from aix360.algorithms.contrastive import CEMExplainer
  from aix360.algorithms.contrastive import KerasClassifier
  from aix360.datasets import MNISTDataset
  from keras.models import model_from_json
  import matplotlib.pyplot
  import numpy
label_desc: Use image node_id 1 for calling the TestCEMExplainer obj's underlying member method code with example usage: obj.load_model(model_json_file, model_wt_file) and returns: model