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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setup_sdk_logging(logfile=None, loglevel=logging.INFO):
 """ Setup a NullHandler to the root logger. If ``logfile`` is passed, additionally add a FileHandler in ``loglevel`` level. Args: logfile(str):
 A path to setup a log file. loglevel(int):
 :mod:`logging` log level. Returns: None """


    logging.root.setLevel(logging.DEBUG)
    logging.root.addHandler(logging.NullHandler())
    if logfile:
        fh = logging.FileHandler(logfile)
        fh.setLevel(loglevel)
        fh.setFormatter(get_default_log_formatter())
        logging.root.addHandler(fh)