code: def testRaisesErrorForSubclassModels(self):
      class MyModel(keras.Model):
          pass
  
      with self.assertRaises(ValueError):
          ModelTransformer(
              MyModel(), [self.ReplaceDenseLayer()]
          ).transform()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_model_optimization.python.core.quantization.keras import utils
  from tensorflow_model_optimization.python.core.quantization.keras.graph_transformations import model_transformer
  from tensorflow_model_optimization.python.core.quantization.keras.graph_transformations import transforms
label_desc: Use image node_id 29 for calling the ModelTransformerTest obj's underlying member method code with example usage: obj.testRaisesErrorForSubclassModels() without return types