code: def documented(obj, doc):
      """Adds a docstring to typealias by overriding the `__doc__` attribute.
  
      Note: Overriding `__doc__` is only possible after python 3.7.
  
      Args:
        obj: Typealias object that needs to be documented.
        doc: Docstring of the typealias. It should follow the standard pystyle
          docstring rules.
  
      Returns:
        Documented variables.
      """
      if isinstance(obj, int) or obj in [(), None, ""]:
          raise ValueError(f"Can't add docs to singletons: `{obj}`.")
      try:
          obj.__doc__ = doc
      except AttributeError:
          EXTRA_DOCS[id(obj)] = doc
      return obj
  
label_desc: Use image node_id 1 for calling a global function with example usage: documented(obj, doc) and returns: obj