code: def assert_never(obj: NoReturn) -> NoReturn:
      """Statically assert that a line of code is unreachable.
  
      Backport of typing.assert_never (introduced in Python 3.11).
      """
      raise AssertionError(
          f"Expected code to be unreachable, but got: {obj}"
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: assert_never(obj) without return types