code: func StandardHook() LogrusStackHook {
  	return LogrusStackHook{
  		CallerLevels: logrus.AllLevels,
  		StackLevels:  []logrus.Level{logrus.PanicLevel, logrus.FatalLevel, logrus.ErrorLevel},
  	}
  }
docs: // StandardHook is a convenience initializer for LogrusStackHook{} with
  // default args.