code: def default_distdiff_options(updates=None):
      
  
      parser = create_optparser()
      options = parser.parse_args(list())
  
      if updates:
          # pylint: disable=W0212
          options._update_careful(updates)
  
      return options
docs: generate an options object with the appropriate default values in
      place for API usage of distdiff features. overrides is an optional
      dictionary which will be used to update fields on the options
      object.