code: def test_create_accumulator(self):
      count, sum_, n_partitions = (
          np.array([1, 2]),
          np.array([1]),
          np.array([2]),
      )
      combiner = combiners.RawStatisticsCombiner()
      self.assertEqual(
          combiner.create_accumulator((count, sum_, n_partitions)),
          (2, 3),
      )
  
imports: import dataclasses
  import numpy
  from absl.testing import absltest
  from absl.testing import parameterized
  from unittest.mock import patch
  from typing import Tuple
  import pipeline_dp
  from analysis import per_partition_combiners
  from analysis import metrics
  from analysis.tests import common
label_desc: Use image node_id 1 for calling the RawStatisticsTest obj's underlying member method code with example usage: obj.test_create_accumulator() without return types