<?php
/**
 * IObserver interface
 * @author Jérôme Brilland
 * @version 1.0
 * @copyright (c) 2023, Jérôme Brilland
 * @license http://www.gnu.org/licenses/gpl.txt GNU General Public License
 */
interface IObserver {
    
    public function update( ISubject $subject );
    
}
