the undefined object
This is one of the three Funky root objects.
| std_types::object | the prototype object for all "normal" objects |
| std_types::error | the prototype object for all error objects |
| std::is_an_error | the special undefined object is not an error |
| std::is_undefined | |
| std::default_value | returns the *default* |
| std::equal | is only equal to itself |