code: def test_map_returns_correct_results_and_accountant(self):
      runner = fn_api_runner.FnApiRunner()
      with beam.Pipeline(runner=runner) as pipeline:
          # Arrange
          pcol_input = [(1, 2), (2, 3), (3, 4), (4, 5)]
          pcol = pipeline | "Create produce" >> beam.Create(pcol_input)
          budget_accountant = budget_accounting.NaiveBudgetAccountant(
              total_epsilon=1, total_delta=0.01
          )
          private_collection = (
              pcol
              | "Create private collection"
              >> private_beam.MakePrivate(
                  budget_accountant=budget_accountant,
                  privacy_id_extractor=PrivateBeamTest.privacy_id_extractor,
              )
          )
  
          # Act
          transformed = private_collection | private_beam.Map(
              fn=lambda x: x[1] ** 2
          )
  
          # Assert
          self.assertIsInstance(
              transformed, private_beam.PrivatePCollection
          )
          beam_util.assert_that(
              transformed._pcol,
              beam_util.equal_to(
                  map(
                      lambda x: (
                          PrivateBeamTest.privacy_id_extractor(x),
                          x[1] ** 2,
                      ),
                      pcol_input,
                  )
              ),
          )
          self.assertEqual(
              transformed._budget_accountant, budget_accountant
          )
  
imports: import unittest
  import apache_beam
  from apache_beam.runners.portability import fn_api_runner
  from apache_beam import pvalue
  from unittest.mock import patch
  import apache_beam.testing.util
  from apache_beam.testing.test_pipeline import TestPipeline
  import pipeline_dp
  from pipeline_dp import private_beam
  from pipeline_dp import aggregate_params, budget_accounting
label_desc: Use image node_id 23 for calling the PrivateBeamTest obj's underlying member method code with example usage: obj.test_map_returns_correct_results_and_accountant() without return types