fun run() {
        val request = Request.Builder()
            .url("http://httpbin.org/delay/1") // This URL is served with a 1 second delay.
            .build()

        // Copy to customize OkHttp for this request.
        val client1 = client.newBuilder()
            .readTimeout(500, TimeUnit.MILLISECONDS)
            .build()
        try {
          client1.newCall(request).execute().use { response ->

        }
    }

    /**
     * Updates documents in an index using a query.
     *
     * @param index   the index name
     * @param option  function to customize the search request
     * @param builder function to build update requests from search hits
     * @return the number of documents processed
     */