protected SelendroidStandaloneDriver getSelendroidDriver(HttpRequest request) {
    return (SelendroidStandaloneDriver) request.data().get(BaseServlet.DRIVER_KEY);
  }
Implement this in subclasses to handle the request. Don't override {@link #handle(HttpRequest)} directly.
selendroid-standalone/src/main/java/io/selendroid/standalone/server/BaseSelendroidStandaloneHandler.java