code: def test_sum_merge(self, **kwargs):
      sum_accumulator = accumulator.SumAccumulator([])
      total_sum = 0
      for data in kwargs.values():
          total_sum += sum(data)
          sum_accumulator.add_accumulator(
              accumulator.SumAccumulator(data)
          )
      self.assertEqual(sum_accumulator.compute_metrics(), total_sum)
  
file_path: pipelinedp/utility_analysis/tests/raw_accumulator_test.py
imports: from absl.testing import absltest
  from absl.testing import parameterized
  import pipeline_dp
  from utility_analysis import raw_accumulator
label_desc: Use image node_id 4 for calling the AccumulatorTest obj's underlying member method code with example usage: obj.test_sum_merge() without return types