src/vs/platform/driver/electron-main/driver.ts/Driver/getWindowDriver
class Driver:	private async getWindowDriver(windowId: number): Promise<IWindowDriver> {
		await this.whenUnfrozen(windowId);

		const id = `window:${windowId}`;
		const router = new StaticRouter(ctx => ctx === id);
		const windowDriverChannel = this.windowServer.getChannel('windowDriver', router);
		return new WindowDriverChannelClient(windowDriverChannel);
	}