.build()
    val response = client.newCall(headRequest).execute()
    assertThat(response.code).isEqualTo(200)
    assertArrayEquals(ByteArray(0), response.body.bytes())
    val getRequest = Request(server.url("/"))
    executeSynchronously(getRequest)
      .assertCode(200)
      .assertBody("abc")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0)
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(1)
  }

    @Override
    public ActionFuture<GetResponse> get(final GetRequest request) {
        return client.get(request);
    }

    /**
     * Gets a document asynchronously with a callback.
     *
     * @param request  the get request
     * @param listener the response listener
     */
    @Override
    public void get(final GetRequest request, final ActionListener<GetResponse> listener) {