code: def test_function_module_name(self):
      ser = CloudPickleSerializer()
  
      def func(x):
          return x
  
      func2 = ser.loads(ser.dumps(func))
      self.assertEqual(func.__module__, func2.__module__)
  
imports: import math
  import sys
  import unittest
  from pyspark import serializers
  from pyspark.serializers import CloudPickleSerializer, CompressedSerializer, AutoBatchedSerializer, BatchedSerializer, AutoSerializer, NoOpSerializer, PairDeserializer, FlattenedValuesSerializer, CartesianDeserializer, CPickleSerializer, UTF8Deserializer, MarshalSerializer
  from pyspark.testing.utils import PySparkTestCase, read_int, write_int, ByteArrayOutput, have_numpy, have_scipy
label_desc: Use image node_id 3 for calling the SerializationTestCase obj's underlying member method code with example usage: obj.test_function_module_name() and returns: x