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Logtalk - Object oriented extension to Prolog
Release 2.22.2

Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
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To load all entities in this group load the dependents_loader.lgt 
utility file:

	| ?- logtalk_load(dependents_loader).

The categories "observer" and "subject" implement the Smalltalk 
dependent handling mechanism.