code: def test_plot_groups(self, mock_show):
      bias_report.plot_groups()
  
file_path: bias-detector/tests/test_BiasReport.py
imports: import pandas
  import os
  from .common import *
  from bias_detector.BiasDetector import BiasDetector
  from bias_detector.BiasReport import BiasReport
  from unittest.mock import patch
label_desc: Use image node_id 1 for calling the TestBiasReport obj's underlying member method code with example usage: obj.test_plot_groups(mock_show) without return types