code: def get_pretrained_cfg_value(model_name, cfg_key):
      """Get a specific model default_cfg value by key. None if it doesn't exist."""
      if model_name in _model_pretrained_cfgs:
          return _model_pretrained_cfgs[model_name].get(cfg_key, None)
      return None
  
file_path: generalized-moe/domainbed/registry.py
imports: import sys
  import re
  import fnmatch
  from collections import defaultdict
  from copy import deepcopy
label_desc: Use image node_id 12 for calling a global function with example usage: get_pretrained_cfg_value(model_name, cfg_key) and returns: None, _model_pretrained_cfgs