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 items(self):
      self._initialize()
      return self._data.keys()
  
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 6 for calling the _LazyLoadAllMappings obj's underlying member method code with example usage: obj.items() and returns: self