code: def find_global_jupytext_configuration_file():
      """Return the global Jupytext configuration file, if any"""
  
      for config_dir in global_jupytext_configuration_directories():
          config_file = find_jupytext_configuration_file(
              config_dir, False
          )
          if config_file:
              return config_file
  
      return None
  
imports: import json
  import os
  import warnings
  import yaml
  from traitlets import Bool, Dict, Enum, Float, List, Unicode, Union
  from traitlets.config import Configurable
  from traitlets.config.loader import PyFileConfigLoader
  from traitlets.traitlets import TraitError
  from .formats import NOTEBOOK_EXTENSIONS, long_form_multiple_formats, long_form_one_format, short_form_multiple_formats
label_desc: Use image node_id 3 for calling a global function with example usage: find_global_jupytext_configuration_file() and returns: None, config_file