code: def _build_demjson_config(self, demjson_string):
      if demjson_string is None:
          return OmegaConf.create()
  
      try:
          import demjson
      except ImportError:
          logger.warning("demjson is required to use config_override")
          raise
  
      demjson_dict = demjson.decode(demjson_string)
      return OmegaConf.create(demjson_dict)
  
imports: import collections
  import json
  import logging
  import os
  import warnings
  from ast import literal_eval
  from typing import List
  import torch
  from mmf.common.registry import registry
  from mmf.utils.env import import_user_module
  from mmf.utils.file_io import PathManager
  from mmf.utils.general import get_absolute_path, get_mmf_root
  from omegaconf import DictConfig, errors, OmegaConf
label_desc: Use image node_id 10 for calling the Configuration obj's underlying member method code with example usage: obj._build_demjson_config(demjson_string) and returns: OmegaConf, OmegaConf