code: def testParseSavedModelSignature_DefaultTagSet(self):
      model_path = self._MockSavedModel(
          {
              "meta_graphs": [
                  {
                      "meta_info_def": {"tags": ["serve"]},
                      "signature_def": {"foo": {}},
                  }
              ]
          }
      )
  
      signatures = request_builder._parse_saved_model_signatures(
          model_path, tag_set=set(), signature_names=["foo"]
      )
  
      self.assertTrue(signatures)
  
imports: import os
  from typing import Any, Dict
  from unittest import mock
  import tensorflow
  from tfx.components.infra_validator import request_builder
  from tfx.proto import infra_validator_pb2
  from tfx.types import artifact_utils
  from tfx.types import standard_artifacts
  from tfx.utils import path_utils
  from google.protobuf import json_format
  from tensorflow.core.protobuf import meta_graph_pb2
  from tensorflow.core.protobuf import saved_model_pb2
  from tensorflow_serving.apis import classification_pb2
  from tensorflow_serving.apis import predict_pb2
  from tensorflow_serving.apis import regression_pb2
label_desc: Use image node_id 6 for calling the TestParseSavedModelSignature obj's underlying member method code with example usage: obj.testParseSavedModelSignature_DefaultTagSet() without return types