'Perform configuration which is common to root and non-root loggers.'

def common_logger_config(self, logger, config, incremental=False):

    level = config.get('level', None)
    if (level is not None):
        logger.setLevel(logging._checkLevel(level))
    if (not incremental):
        for h in logger.handlers[:]:
            logger.removeHandler(h)
        handlers = config.get('handlers', None)
        if handlers:
            self.add_handlers(logger, handlers)
        filters = config.get('filters', None)
        if filters:
            self.add_filters(logger, filters)
    return
