code: func New(pluginName string) *Logger {
  	lg := log.New(os.Stdout, "", log.Ldate|log.Ltime)
  	if len(pluginName) == 0 {
  		return &Logger{logger: lg}
  	}
  	return &Logger{
  		prefix: fmt.Sprintf("[%s] ", pluginName),
  		logger: lg,
  	}
  }
docs: // New returns a Logger which supports a custom prefix representing a plugin's
  // name.