code: def add_item_to_lookup_tables(
      title: Text,
      item: Text,
      existing_lookup_tables: List[Dict[Text, Union[Text, List[Text]]]],
  ) -> None:
      """Add an item to a list of existing lookup tables.
  
      Takes a list of lookup table dictionaries. Finds the one associated
      with the current lookup, then adds the item to the list.
  
      Args:
          title: Name of the lookup item.
          item: The lookup item.
          existing_lookup_tables: Existing lookup items that will be extended.
  
      Raises:
          TypeError: in case we're trying to add a lookup table element to a file.
                     This is an internal error that is indicative of a parsing error.
      """
      matches = [
          table
          for table in existing_lookup_tables
          if table["name"] == title
      ]
      if not matches:
          existing_lookup_tables.append(
              {"name": title, "elements": [item]}
          )
      else:
          elements = matches[0]["elements"]
          if not isinstance(elements, list):
              raise TypeError(
                  "Cannot add a lookup table element to an unloaded file."
              )
          elements.append(item)
  
label_desc: Use image node_id 1 for calling a global function with example usage: add_item_to_lookup_tables(title, item, existing_lookup_tables) without return types