Set a value for a metaclass Once a lookup_value is called, using this function is illegal.
find the appropriate T for this SuifObject If the object does not have an entry, get the value for it's metaclass.
Once this method is called, it is illegal to call put_value() again
Get the value for this object, if there is none, return NULL.
written by Dimitri van Heesch, © 1997-1999