private static WebDriver getDriverProxyObj(Class<? extends WebDriver> of, Capabilities capabilities, URL url,
		Factory factory) {
	try {
		// give it first try
		// Constructor<? extends WebDriver> constructor =
		// of.getConstructor(HttpCommandExecutor.class,
		// Capabilities.class);
		Constructor<? extends WebDriver> constructor = of.getConstructor(URL.class, Factory.class,
				Capabilities.class);
		return constructor.newInstance(url, factory, capabilities);
	} catch (Exception ex) {
		return null;
	}
}