func Logger() *logging.Logger {

	if defaultLogger == nil {
		logger, _ := logging.SimpleLogger("bambou")
		defaultLogger = logger
		logger.SetLevel(logging.ERROR)
	}

	return defaultLogger
}
func Logger() *logging.Logger {

	if defaultLogger == nil {
		logger, _ := logging.SimpleLogger("bambou")
		defaultLogger = logger
		logger.SetLevel(logging.ERROR)
	}

	return defaultLogger
}
// Logger returns the defaut Bambou logger.