How to use the webdriver-manager/built/lib/config.Config function in webdriver-manager

'use strict';

var gulp = require('gulp');
var path = require('path');
var SeleniumConfig = require('webdriver-manager/built/lib/config').Config;
var SeleniumStandAlone = require('webdriver-manager/built/lib/binaries/stand_alone').StandAlone;

var $ = require('gulp-load-plugins')({
   pattern: ['gulp-*', 'browser-sync', 'run-sequence']
});

gulp.task('scripts-tests', function () {
  return gulp.src(['test/**/*.js'])
    .pipe($.jshint())
    .pipe($.jshint.reporter('jshint-stylish'))
    .pipe($.jshint.reporter('fail'))
    .pipe($.size());
});

// Downloads the selenium webdriver
gulp.task('webdriver-update', function (done) {

'use strict';

var path = require('path');
var SeleniumConfig = require('webdriver-manager/built/lib/config').Config;
var SeleniumChrome = require('webdriver-manager/built/lib/binaries/chrome_driver').ChromeDriver;
var seleniumChrome = new SeleniumChrome();
seleniumChrome.versionCustom = '2.30';

// An example configuration file.
exports.config = {
  baseUrl: 'http://localhost:9000/',
  chromeDriver: path.resolve(SeleniumConfig.getSeleniumDir(), seleniumChrome.executableFilename()),

  // Capabilities to be passed to the webdriver instance.
  capabilities: {
    browserName: 'chrome',
    chromeOptions: {
      args: ['--headless', '--disable-gpu', '--window-size=1280,800']
    }
  },

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*
 *  This is an implementation of the Direct Driver Provider.
 *  It is responsible for setting up the account object, tearing
 *  it down, and setting up the driver correctly.
 */
const fs = require("fs");
const path = require("path");
const q = require("q");
const selenium_webdriver_1 = require("selenium-webdriver");
const chrome_1 = require("selenium-webdriver/chrome");
const exitCodes_1 = require("../exitCodes");
const logger_1 = require("../logger");
const driverProvider_1 = require("./driverProvider");
const SeleniumConfig = require('webdriver-manager/built/lib/config').Config;
let logger = new logger_1.Logger('direct');
class Direct extends driverProvider_1.DriverProvider {
    constructor(config) {
        super(config);
    }
    /**
     * Configure and launch (if applicable) the object's environment.
     * @return {q.promise} A promise which will resolve when the environment is
     *     ready to test.
     */
    setupDriverEnv() {
        switch (this.config_.capabilities.browserName) {
            case 'chrome':
                logger.info('Using ChromeDriver directly...');
                break;
            case 'firefox':

Object.defineProperty(exports, "__esModule", { value: true });
/*
 * This is an implementation of the Local Driver Provider.
 * It is responsible for setting up the account object, tearing
 * it down, and setting up the driver correctly.
 *
 * TODO - it would be nice to do this in the launcher phase,
 * so that we only start the local selenium once per entire launch.
 */
const fs = require("fs");
const path = require("path");
const q = require("q");
const exitCodes_1 = require("../exitCodes");
const logger_1 = require("../logger");
const driverProvider_1 = require("./driverProvider");
const SeleniumConfig = require('webdriver-manager/built/lib/config').Config;
const remote = require('selenium-webdriver/remote');
let logger = new logger_1.Logger('local');
class Local extends driverProvider_1.DriverProvider {
    constructor(config) {
        super(config);
        this.server_ = null;
    }
    /**
     * Helper to locate the default jar path if none is provided by the user.
     * @private
     */
    addDefaultBinaryLocs_() {
        if (!this.config_.seleniumServerJar) {
            logger.debug('Attempting to find the SeleniumServerJar in the default ' +
                'location used by webdriver-manager');
            try {