def METHOD_NAME():
    parser = argparse.ArgumentParser(description='Process images, produce drizzled images and sourcelists')
    parser.add_argument('input_filename', help='Name of the input csv file containing information about the '
                        'files to be processed')
    parser.add_argument('-c', '--input_custom_pars_file', required=False, default=None, help='filename of a '
                        'configuration JSON file which has been customized for specialized processing. This '
                        'file should contain ALL the input parameters necessary for processing. If not '
                        'specified, default configuration parameter values will be used.')
    parser.add_argument('-d', '--diagnostic_mode', required=False, action='store_true', help='If this option '
                        'is turned on, additional log messages will be displayed and additional files will '
                        'be created during the course of the run.')
    parser.add_argument('-l', '--log_level', required=False, default='info',
                        choices=['critical', 'error', 'warning', 'info', 'debug'], help='The desired level '
                        'of verboseness in the log statements displayed on the screen and written to the '
                        '.log file. The level of verboseness from left to right, and includes all log '
                        'statements with a log_level left of the specified level. Specifying "critical" will '
                        'only record/display "critical" log statements, and specifying "error" will '
                        'record/display both "error" and "critical" log statements, and so on.')
    user_args = parser.parse_args()
    print("Single-visit processing started for: {}".format(user_args.input_filename))
    rv = perform(user_args.input_filename, input_custom_pars_file=user_args.input_custom_pars_file,
                 diagnostic_mode=user_args.diagnostic_mode, log_level=user_args.log_level)
    print("Return Value: ", rv)
    return rv