class_docstr: " A mapping config to object (model or tokenizer for instance) that will load keys and values when it is accessed.
  
  Args:
      - config_mapping: The map model type to config class
      - model_mapping: The map model type to model (or tokenizer) class
class_docstr_tok: ["``","A","mapping","config","to","object","(","model","or","tokenizer","for","instance",")","that","will","load","keys","and","values","when","it","is","accessed",".","Args",":","-","config_mapping",":","The","map","model","type","to","config","class","-","model_mapping",":","The","map","model","type","to","model","(","or","tokenizer",")","class"]
code: def get(self, key, default):
      try:
          return self.__getitem__(key)
      except KeyError:
          return default
  
imports: import importlib
  from collections import OrderedDict
  from ...configuration_utils import PretrainedConfig
  from ...dynamic_module_utils import get_class_from_dynamic_module
  from ...utils import copy_func, logging
  from .configuration_auto import AutoConfig, model_type_to_module_name, replace_list_option_in_docstrings
label_desc: Use image node_id 5 for calling the _LazyAutoMapping obj's underlying member method code with example usage: obj.get(key, default) and returns: self, default