public TestConfig testConfig(ApplicationId id, ZoneId zone) {
        return TestConfig.fromJson(send(request(HttpRequest.newBuilder(testConfigPath(id, zone))
                                                           .timeout(Duration.ofSeconds(10)),
                                                GET)).body());
    }
Returns the test config for functional and verification tests of the indicated Vespa deployment.
hosted-api/src/main/java/ai/vespa/hosted/api/ControllerHttpClient.java