code: def test_list_to_contribution_histograms(self):
      histogram1 = hist.Histogram(
          hist.HistogramType.L0_CONTRIBUTIONS, []
      )
      histogram2 = hist.Histogram(
          hist.HistogramType.L1_CONTRIBUTIONS, []
      )
      histogram3 = hist.Histogram(
          hist.HistogramType.LINF_CONTRIBUTIONS, []
      )
      histogram4 = hist.Histogram(
          hist.HistogramType.LINF_SUM_CONTRIBUTIONS, []
      )
      histogram5 = hist.Histogram(
          hist.HistogramType.COUNT_PER_PARTITION, []
      )
      histogram6 = hist.Histogram(
          hist.HistogramType.COUNT_PRIVACY_ID_PER_PARTITION, []
      )
      histograms = (
          computing_histograms._list_to_contribution_histograms(
              [
                  histogram2,
                  histogram1,
                  histogram3,
                  histogram4,
                  histogram6,
                  histogram5,
              ]
          )
      )
      self.assertEqual(
          histogram1, histograms.l0_contributions_histogram
      )
      self.assertEqual(
          histogram2, histograms.l1_contributions_histogram
      )
      self.assertEqual(
          histogram3, histograms.linf_contributions_histogram
      )
      self.assertEqual(
          histogram4, histograms.linf_sum_contributions_histogram
      )
      self.assertEqual(
          histogram5, histograms.count_per_partition_histogram
      )
      self.assertEqual(
          histogram6, histograms.count_privacy_id_per_partition
      )
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  import pipeline_dp
  from pipeline_dp.dataset_histograms import histograms
  from pipeline_dp.dataset_histograms import computing_histograms
  from analysis import pre_aggregation
label_desc: Use image node_id 4 for calling the ComputingHistogramsTest obj's underlying member method code with example usage: obj.test_list_to_contribution_histograms() without return types