code: def test_model_with_list_output_raises_error(self):
      with self.assertRaises(TypeError):
          self._export(
              self._model_with_list_output, self._saved_model_path
          )
  
file_path: ranking/tensorflow_ranking/python/keras/saved_model_test.py
imports: import tensorflow
  from google.protobuf import text_format
  from tensorflow_ranking.python.keras import saved_model
  from tensorflow_serving.apis import input_pb2
label_desc: Use image node_id 8 for calling the SignaturesTest obj's underlying member method code with example usage: obj.test_model_with_list_output_raises_error() without return types