code: def testIssueRequests_NoErrorIfSucceeded(self):
      # Prepare requests and client.
      r1 = classification_pb2.ClassificationRequest()
      r2 = classification_pb2.ClassificationRequest()
      r3 = regression_pb2.RegressionRequest()
      client = tensorflow_serving_client.TensorFlowServingClient(
          "localhost:1234", "a_model_name"
      )
  
      # Call.
      client.SendRequests([r1, r2, r3])
  
      # Check calls
      self.prediction_stub.Classify.assert_called_with(r1)
      self.prediction_stub.Classify.assert_called_with(r2)
      self.prediction_stub.Regress.assert_called_with(r3)
  
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 8 for calling the TensorflowServingClientTest obj's underlying member method code with example usage: obj.testIssueRequests_NoErrorIfSucceeded() without return types