code: def setUp(self):
      super().setUp()
      self._saved_model_path = self.create_tempdir().full_path
      (
          self._model,
          self._model_with_dict_output,
          self._model_with_list_output,
      ) = _create_test_ranking_models()
  
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 1 for calling the SignaturesTest obj's underlying member method code with example usage: obj.setUp() without return types