def add_signaling_arguments(parser):
    """
    Add signaling method arguments to an argparse.ArgumentParser.
    """
    parser.add_argument('--signaling-host', default='127.0.0.1', help=
        'Signaling host (websocket server host)')
    parser.add_argument('--signaling-port', default=1234, help=
        'Signaling port (websocket server port)')
