__WikiEventListener__ defines an interface for an object that listens for WikiEvents.

The interface has only one method, similar to the signature of {{java.awt.event.~ActionListener}}:
{{{
   /**
     * Fired when a WikiEvent is triggered by an event source.
     *
     * @param event    a WikiEvent object
     */
    public void actionPerformed( WikiEvent event );
}}}

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See also: WikiEvent, WikiEventManager