code: def test_collect_detections(self):
      detected_pairs = self.verification_with_bias.collect_detections()
      assert len(detected_pairs) == 1
      assert detected_pairs[0] == ("conv", "bn")
  
file_path: allennlp/tests/confidence_checks/normalization_bias_verification_test.py
imports: import torch
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.common.testing.confidence_check_test import FakeModelForTestingNormalizationBiasVerification
  from allennlp.confidence_checks.normalization_bias_verification import NormalizationBiasVerification
label_desc: Use image node_id 3 for calling the TestNormalizationBiasVerification obj's underlying member method code with example usage: obj.test_collect_detections() without return types