code: def gen_standard_mock_service_client(self, instances=None):
      name_to_ip = {}
      instance_list = []
      for instance in instances:
          name_to_ip[instance["name"]] = instance["ip"]
          instance_list.append(
              {
                  "instance": "https://gce.example.com/gce/res/"
                  + instance["name"]
              }
          )
  
      mock_instance = self.standard_mock_instances(name_to_ip)
      mock_instance_group = self.standard_mock_instance_groups(
          instance_list
      )
  
      return self.standard_mock_service_client(
          mock_instance_group, mock_instance
      )
  
file_path: tensorflow-upstream/tensorflow/python/distribute/cluster_resolver/gce_cluster_resolver_test.py
imports: from tensorflow.python.distribute.cluster_resolver.cluster_resolver import UnionClusterResolver
  from tensorflow.python.distribute.cluster_resolver.gce_cluster_resolver import GCEClusterResolver
  from tensorflow.python.platform import test
  from tensorflow.python.training import server_lib
label_desc: Use image node_id 5 for calling the GCEClusterResolverTest obj's underlying member method code with example usage: obj.gen_standard_mock_service_client(instances) and returns: self