code: def get_mmf_env(key=None):
      config = get_global_config()
      if key:
          return OmegaConf.select(config.env, key)
      else:
          return config.env
  
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 8 for calling a global function with example usage: get_mmf_env(key) and returns: OmegaConf, config