code: def __setitem__(self, key, value):
      if key in self:
          raise KeyError("Can't update key '%s'" % key)
      super(UnupdatableDict, self).__setitem__(key, value)
  
file_path: snips-nlu/snips_nlu/common/dict_utils.py
imports: from collections import OrderedDict
label_desc: Use image node_id 1 for calling the UnupdatableDict obj's underlying member method code with example usage: obj.__setitem__(key, value) without return types