code: function writeToProcessStream(processStreamName, string) {
    var writableStream = process[processStreamName]
    if (writableStream) {
      writableStream.write(string + '\n')
    } else {
      throw new Error('Unrecognized process stream: ' + exports.stylize(processStreamName))
    }
  }
docs: Writes `string` with a trailing newline to `processStreamName`.
  
  @private
  @static
  @param {string} processStreamName The name of the writable process stream (e.g., `stout`, `stderr`).
  @param {string} string The string to print.