code: func defaultLogBatchConfig() pluginbuffered.BatchConfig {
  	return pluginbuffered.BatchConfig{
  		BufferSize: defaultBatchBufferSize,
  		// Batching is not useful for the log-file backend.
  		// MaxBatchWait ignored.
  		MaxBatchSize:   1,
  		ThrottleEnable: false,
  		// Asynchronous log threads just create lock contention.
  		AsyncDelegate: false,
  	}
  }
docs: // defaultLogBatchConfig returns the default BatchConfig used by the Log backend.