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This file is part of Logtalk <http://logtalk.org/>  
Copyright (c) 1998-2015 Paulo Moura <pmoura@logtalk.org>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

Additional licensing terms apply per Section 7 of the GNU General
Public License 3. Consult the `LICENSE.txt` file for details.
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To load all entities in this group load the `dependents_loader.lgt`
utility file:

	| ?- logtalk_load(library(dependents_loader)).

The `observer` and `subject` categories implement the Smalltalk 
dependents handling mechanism. This mechanism can be used as an
alternative to Logtalk's system-wide support for event-driven
programming.
