Summary

 $Id: listener.icn,v 1.3 2006-01-17 12:42:24 rparlett Exp $

 This file is in the public domain.

 Author: Robert Parlett (parlett@dial.pipex.com)

 What is a listener, really?  Formerly, it was a 3-tuple that held an
 object, a method to call, and a "type" of event that could occur.
 This abstraction has been renamed Subscription.  Arguably, the object
 in the subscription is the listener.

This file is part of the util package.