code: def test_torch_param_serialize(self):
      serialized_backend = _torch_param_serialize(
          EstimatorParams.backend.name, "dummy_value"
      )
      assert serialized_backend is None
  
      serialized_store = _torch_param_serialize(
          EstimatorParams.store.name, "dummy_value"
      )
      assert serialized_store is None
  
      serialized_dummy_param = _torch_param_serialize(
          "dummy_param_name", None
      )
      assert serialized_dummy_param is None
  
imports: import logging
  import os
  import sys
  import unittest
  import warnings
  import mock
  from unittest.mock import Mock
  import pytest
  import numpy
  from packaging import version
  import torch
  import torch.nn
  from torch.nn import functional
  from pyspark.ml.linalg import VectorUDT
  from pyspark.sql.types import FloatType, IntegerType
  import pytorch_lightning
  import horovod
  import horovod.torch
  from horovod.torch.elastic import run
  import horovod.spark.lightning
  from horovod.spark.lightning import remote
  from horovod.spark.lightning.estimator import EstimatorParams, _torch_param_serialize, MIN_PL_VERSION
  from horovod.spark.lightning.legacy import to_lightning_module
  from horovod.common.util import gloo_built
  from horovod.spark.common import constants, util
  from common import tempdir, spawn, is_built
  from spark_common import CallbackBackend, create_noisy_xor_data, create_noisy_xor_data_with_val, create_xor_data, local_store, spark_session
label_desc: Use image node_id 9 for calling the SparkLightningTests obj's underlying member method code with example usage: obj.test_torch_param_serialize() without return types