code: def test_sum_not_supported(self):
      with self.assertRaisesRegex(
          ValueError, "Only COUNT and PRIVACY_ID_COUNT are supported"
      ):
          self._get_estimator(pipeline_dp.Metrics.SUM)
  
file_path: pipelinedp/tests/dataset_histograms/histogram_error_estimator_test.py
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 pipeline_dp.dataset_histograms import histogram_error_estimator
label_desc: Use image node_id 4 for calling the HistogramErrorEstimatorTest obj's underlying member method code with example usage: obj.test_sum_not_supported() without return types