class_docstr: A dictionary that lazily load its values when they are requested.
docstr: Register a new configuration in this mapping.
code: def register(self, key, value, exist_ok=False):
      """
      Register a new configuration in this mapping.
      """
      if key in self._mapping.keys() and not exist_ok:
          raise ValueError(
              f"'{key}' is already used by a Transformers config, pick another name."
          )
      self._extra_content[key] = value
  
imports: import importlib
  import os
  import re
  import warnings
  from collections import OrderedDict
  from typing import List, Union
  from ...configuration_utils import PretrainedConfig
  from ...dynamic_module_utils import get_class_from_dynamic_module, resolve_trust_remote_code
  from ...utils import CONFIG_NAME, logging
label_desc: Use image node_id 8 for calling the _LazyConfigMapping obj's underlying member method code with example usage: obj.register(key, value, exist_ok) without return types