code: func InitBackend(formatter logging.Formatter, output io.Writer) {
  	backend := logging.NewLogBackend(output, "", 0)
  	backendFormatter := logging.NewBackendFormatter(backend, formatter)
  	logging.SetBackend(backendFormatter).SetLevel(logging.INFO, "")
  }
docs: // InitBackend sets up the logging backend based on
  // the provided logging formatter and I/O writer.