# Pastebin 8wPVAl5y
/**
   * Specify a request handler for the route. The router routes requests to handlers depending on whether the various
   * criteria such as method, path, etc match. There can be only one request handler for a route. If you set this more
   * than once it will overwrite the previous handler.
   *
   * @param requestHandler  the request handler
   * @return a reference to this, so the API can be used fluently
   */
  @Fluent
  Route handler(Handler<RoutingContext> requestHandler);