* @throws SearchEngineClientException if the client is not an HttpClient
     */
    public EngineInfo getEngineInfo() {
        if (client instanceof final HttpClient httpClient) {
            return httpClient.getEngineInfo();
        }
        throw new SearchEngineClientException("client is not HttpClient.");
    }

    //
    // Fesen Client
    //

    /**

  @Test
  fun setProtocolsWithoutHttp11() {
    assertFailsWith<IllegalArgumentException> {
      OkHttpClient
        .Builder()
        .protocols(Arrays.asList(Protocol.HTTP_2))
    }
  }

  @Test
  fun setProtocolsWithNull() {
    assertFailsWith<IllegalArgumentException> {
      OkHttpClient
        .Builder()
        .protocols(Arrays.asList(Protocol.HTTP_1_1, null))
    }
  }

HSPLokhttp3/OkHttpClient$Builder;-><init>()V
HSPLokhttp3/OkHttpClient$Companion;-><init>(Landroidx/lifecycle/viewmodel/R$id;)V
HSPLokhttp3/OkHttpClient;-><clinit>()V
HSPLokhttp3/OkHttpClient;-><init>(Lokhttp3/OkHttpClient$Builder;)V
HSPLokhttp3/OkHttpClient;->newBuilder()Lokhttp3/OkHttpClient$Builder;
HSPLokhttp3/OkHttpClient;->newCall(Lokhttp3/Request;)Lokhttp3/Call;

    server.enqueue(MockResponse(body = "ghi"))
    client =
      OkHttpClient
        .Builder()
        .connectionPool(client.connectionPool)
        .proxy(server.proxyAddress)
        .build()
    executeSynchronously("/a").assertBody("abc")
    client =
      OkHttpClient
        .Builder()
        .connectionPool(client.connectionPool)
        .proxy(server.proxyAddress)

  private val server = MockWebServer()

  @StartStop
  private val server2 = MockWebServer()

  private val handshakeCertificates = platform.localhostHandshakeCertificates()
  private lateinit var client: OkHttpClient
  private lateinit var cache: Cache
  private val cookieManager = CookieManager()

  @BeforeEach
  fun setUp() {
    platform.assumeNotOpenJSSE()
    server.protocolNegotiationEnabled = false