code: def __str__(self):
      t = "    "
      if self._name != "root":
          r = f"{t * (self._level-1)}{self._name}:\n"
      else:
          r = ""
      level = self._level
      for i, (k, v) in enumerate(self._pointer.items()):
          if isinstance(v, Config):
              r += f"{t * (self._level)}{v}\n"
              self._level += 1
          else:
              r += f"{t * (self._level)}{k}: {v} ({type(v).__name__})\n"
          self._level = level
      return r[:-1]
  
imports: import copy
  import json
  import os
  import pickle
  import shutil
  import tarfile
  from collections import OrderedDict
  from hashlib import sha256
  from pathlib import Path
  from urllib.parse import urlparse
  from zipfile import is_zipfile, ZipFile
  import numpy
  import requests
  from filelock import FileLock
  from mmf.utils.configuration import get_mmf_cache_dir
  from mmf.utils.download import download
  from omegaconf import OmegaConf
label_desc: Use image node_id 8 for calling the Config obj's underlying member method code with example usage: obj.__str__() and returns: r