code: def count_ensembler_success_pynisher_calls(self) -> int:
      # We expect the return msg to be something like:
      # [DEBUG] [2020-11-30 11:53:47,911:EnsembleBuilder] return value:
      # (([{'Timestamp': Timestamp('2020-11-30 11:53:47.910727'),
      # 'ensemble_optimization_score': 0.9787234042553191}], 50, None, None, None), 0)
      # [DEBUG] [2020-11-30 11:54:05,984:EnsembleBuilder] return value:
      # (([{'Timestamp': Timestamp('2020-11- 30 11:54:05.983837'),
      # 'ensemble_optimization_score': 0.9787234042553191}], 50, None, None, None), 0)
      return_msgs = len(
          [
              line
              for line in self.lines
              if re.search(
                  r"EnsembleBuilder]\s+return value:.*Timestamp", line
              )
          ]
      )
  
      return return_msgs
  
file_path: auto-sklearn/test/test_automl/automl_utils.py
imports: import typing
  import glob
  import os
  import re
  import numpy
label_desc: Use image node_id 4 for calling the AutoMLLogParser obj's underlying member method code with example usage: obj.count_ensembler_success_pynisher_calls() and returns: return_msgs