code: func SetLogLevel(name, level string) error {
  	lvl, err := logging.LogLevel(level)
  	if err != nil {
  		return err
  	}
  
  	// wildcard, change all
  	if name == "*" {
  		SetAllLoggers(lvl)
  		return nil
  	}
  
  	loggerMutex.RLock()
  	defer loggerMutex.RUnlock()
  
  	// Check if we have a logger by that name
  	if _, ok := loggers[name]; !ok {
  		return ErrNoSuchLogger
  	}
  
  	logging.SetLevel(lvl, name)
  
  	return nil
  }
docs: // SetLogLevel changes the log level of a specific subsystem
  // name=="*" changes all subsystems