code: def test_contribution_bounding_applied(self):
      input = [
          ("pid1", "pk1", 1),
          ("pid1", "pk2", 2),
          ("pid1", "pk3", 3),
          ("pid1", "pk4", 4),
          ("pid1", "pk5", 5),
          ("pid1", "pk6", 6),
      ]
      max_contributions = 5
      bound_result = self._run_contribution_bounding(
          input, max_contributions
      )
      self.assertLen(bound_result, max_contributions)
  
file_path: pipelinedp/tests/contribution_bounders_test.py
imports: import collections
  import numpy
  from absl.testing import parameterized
  import pipeline_dp
  import pipeline_dp.contribution_bounders
label_desc: Use image node_id 2 for calling the SamplingPerPrivacyIdContributionBounderTest obj's underlying member method code with example usage: obj.test_contribution_bounding_applied() without return types