class_docstr: A mapping that will load all pairs of key values at the first access (either by indexing, requestions keys, values,
  etc.)
  
  Args:
      mapping: The mapping to load.
code: def _initialize(self):
      if self._initialized:
          return
      warnings.warn(
          "ALL_PRETRAINED_CONFIG_ARCHIVE_MAP is deprecated and will be removed in v5 of Transformers. "
          "It does not contain all available model checkpoints, far from it. Checkout hf.co/models for that.",
          FutureWarning,
      )
  
      for model_type, map_name in self._mapping.items():
          module_name = model_type_to_module_name(model_type)
          module = importlib.import_module(
              f".{module_name}", "transformers.models"
          )
          mapping = getattr(module, map_name)
          self._data.update(mapping)
  
      self._initialized = True
  
imports: import importlib
  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
  from ...utils import CONFIG_NAME, logging
label_desc: Use image node_id 2 for calling the _LazyLoadAllMappings obj's underlying member method code with example usage: obj._initialize() without return types