|                                   |  | 'use strict';var os = require('os');var semver = require('semver');
var nameMap = {	'10.0': '10',	'6.3': '8.1',	'6.2': '8',	'6.1': '7',	'6.0': 'Vista',	'5.1': 'XP',	'5.0': '2000',	'4.9': 'ME',	'4.1': '98',	'4.0': '95'};
module.exports = function (release) {	var verRe = /\d+\.\d+/;	var version = verRe.exec(release || os.release());
	// workaround for Windows 10 on node < 3.1.0
	if (!release && process.platform === 'win32' &&		semver.satisfies(process.version, '>=0.12.0 <3.1.0')) {		try {			version = verRe.exec(String(require('child_process').execSync('ver.exe', {timeout: 2000})));		} catch (err) {}	}
	if (release && !version) {		throw new Error('`release` argument doesn\'t match `n.n`');	}
	return nameMap[(version || [])[0]];};
 |