code: def test_returns_none_when_missing_executor_spec(self):
      self.assertIsNone(
          deployment_config_utils.get_node_executor_spec(
              pipeline_pb2.IntermediateDeploymentConfig(), _NODE_ID
          )
      )
  
file_path: tfx/tfx/orchestration/experimental/core/deployment_config_utils_test.py
imports: import tensorflow
  from tfx.orchestration.experimental.core import deployment_config_utils
  from tfx.proto.orchestration import executable_spec_pb2
  from tfx.proto.orchestration import pipeline_pb2
  from tfx.proto.orchestration import platform_config_pb2
  from google.protobuf import message
label_desc: Use image node_id 5 for calling the DeploymentConfigUtilsTest obj's underlying member method code with example usage: obj.test_returns_none_when_missing_executor_spec() without return types