code: def merge_config(tracker, b):
      for name, config_group in b.items():
          for group_name, options in config_group:
              for option in options:
                  if option.value_supplied:
                      tracker = update_option(
                          tracker, name, group_name, option.name
                      )
  
      return tracker
  
file_path: vowpal_wabbit/test/runtest_coverage.py
imports: from vowpalwabbit import pyvw
  import json
  import os
  from pathlib import Path
label_desc: Use image node_id 6 for calling a global function with example usage: merge_config(tracker, b) and returns: tracker