code: def tearDown(self):
      super().tearDown()
      self.model_stub_patcher.stop()
      self.prediction_stub_patcher.stop()
  
imports: from typing import Any, Dict
  from unittest import mock
  import grpc
  import tensorflow
  from tfx.components.infra_validator import error_types
  from tfx.components.infra_validator import types
  from tfx.components.infra_validator.model_server_clients import tensorflow_serving_client
  from google.protobuf import json_format
  from tensorflow_serving.apis import classification_pb2
  from tensorflow_serving.apis import get_model_status_pb2
  from tensorflow_serving.apis import regression_pb2
label_desc: Use image node_id 2 for calling the TensorflowServingClientTest obj's underlying member method code with example usage: obj.tearDown() without return types