class_docstr: Create the registry that will map name to object.
  This facilitates the users to create custom registry.
code: def __contains__(self, item):
      return item in self._obj_map
  
file_path: autogluon/multimodal/src/autogluon/multimodal/registry.py
imports: import json
  from collections import OrderedDict
  from json import JSONDecodeError
  from typing import List
  from typing import OrderedDict
label_desc: Use image node_id 2 for calling the Registry obj's underlying member method code with example usage: obj.__contains__(item) and returns: unknown