How to use webdriver-js-extender - 1 common examples

constructor(webdriverInstance, opt_baseUrl, opt_rootElement, opt_untrackOutstandingTimeouts, opt_blockingProxyUrl) {
        super();
        // These functions should delegate to the webdriver instance, but should
        // wait for Angular to sync up before performing the action. This does not
        // include functions which are overridden by protractor below.
        let methodsToSync = ['getCurrentUrl', 'getPageSource', 'getTitle'];
        let extendWDInstance;
        try {
            extendWDInstance = webdriver_js_extender_1.extend(webdriverInstance);
        }
        catch (e) {
            // Probably not a driver that can be extended (e.g. gotten using
            // `directConnect: true` in the config)
            extendWDInstance = webdriverInstance;
        }
        // Mix all other driver functionality into Protractor.
        Object.getOwnPropertyNames(selenium_webdriver_1.WebDriver.prototype).forEach(method => {
            if (!this[method] && typeof extendWDInstance[method] === 'function') {
                if (methodsToSync.indexOf(method) !== -1) {
                    ptorMixin(this, extendWDInstance, method, this.waitForAngular.bind(this));
                }
                else {
                    ptorMixin(this, extendWDInstance, method);
                }
            }