code: def test_min_max_elements(self, col, expected_min_max):
      col = self.sc.parallelize(col)
  
      result = composite_funcs.min_max_elements(
          self.backend, col, "Min and max elements"
      ).collect()
  
      self.assertEqual(expected_min_max, list(result))
  
imports: import sys
  import unittest
  from dataclasses import dataclass
  from typing import List
  import apache_beam
  import apache_beam.testing.test_pipeline
  import apache_beam.testing.util
  from absl.testing import parameterized
  import pipeline_dp
  from pipeline_dp import pipeline_functions
  from pipeline_dp import pipeline_backend
label_desc: Use image node_id 5 for calling the SparkRDDBackendTest obj's underlying member method code with example usage: obj.test_min_max_elements(col, expected_min_max) without return types