def METHOD_NAME():
    """
    Get rid of expired connections.  This is intended to sweep up
    connections that are no longer used.  Those in continuous use will
    self-expire and re-create themeselves.
    """
    global next_groom
    if datetime.datetime.now() < next_groom:
        # Not time yet.
        return
    log.debug("Grooming connections")
    for groom in list([ key
                        for key, connection in connections.items()
                        if connection.expired()
                    ]):
        log.debug("Dropping expired connection {}".format(groom))
        del connections[groom]
    next_groom += GROOM_INTERVAL
    log.debug("Next groom at {}".format(next_groom))