Miranda optUncall

From Erights

__optUncall/0 is a miranda message which may return a portrayal of the object receiving it.

The miranda method for this message always returns null.

For Selfless objects, __optUncall is guaranteed to return a portrayal which exactly represents the object; if a is selfless, then a == E.call(E, "call", a.__optUncall()).

__optUncall is typically used by serialization systems for the default portrayal in the absence of other knowledge about the object.