expect:
        JavaVersion.current() == current
        JavaVersion.current().java6 == isJava6
        JavaVersion.current().java7 == isJava7
        JavaVersion.current().java8 == isJava8
        JavaVersion.current().java9 == isJava9
        JavaVersion.current().java10 == isJava10
        JavaVersion.current().java11 == isJava11
        JavaVersion.current().java12 == isJava12

        }
        return stackTrace;
    }

    @SuppressWarnings("Since15")
    private static List<? extends Throwable> extractSuppressed(Throwable throwable) {
        if (isJava7()) {
            return Arrays.asList(throwable.getSuppressed());
        }
        return Collections.emptyList();
    }

    @SuppressWarnings("MixedMutabilityReturnType")

                    assert getClass().getClassLoader() == Thread.currentThread().getContextClassLoader();

                    boolean isJava9 = Boolean.parseBoolean(System.getProperty("isJava9"));

                    List<String> classpath;
                    if (isJava9) {
                        classpath = Arrays.stream(System.getProperty("java.class.path").split(Pattern.quote(File.pathSeparator)))

                    boolean isJava9 = Boolean.parseBoolean(System.getProperty("isJava9"));
                    String[] splitTestRuntimeClasspath = splitClasspath(System.getProperty("testRuntimeClasspath"));
                    if (isJava9) {
                        String[] splitCliClasspath = splitClasspath(System.getProperty("java.class.path"));

    @Override
    protected void doStop() {
      notifyFailed(new IllegalStateException("stop failure"));
    }
  }

  public void testServiceStartupTimes() {
    if (isWindows() && isJava8()) {
      // Flaky there: https://github.com/google/guava/pull/6731#issuecomment-1736298607
      return;
    }
    Service a = new NoOpDelayedService(150);
    Service b = new NoOpDelayedService(353);

    @Override
    protected void doStop() {
      notifyFailed(new IllegalStateException("stop failure"));
    }
  }

  public void testServiceStartupTimes() {
    if (isWindows() && isJava8()) {
      // Flaky there: https://github.com/google/guava/pull/6731#issuecomment-1736298607
      return;
    }
    Service a = new NoOpDelayedService(150);
    Service b = new NoOpDelayedService(353);

         */
        String httpsProtocols = System.getProperty(HTTPS_PROTOCOLS);
        if (httpsProtocols != null) {
            return httpsProtocols.split(",");
        } else if (JavaVersion.current().isJava8() && Jvm.current().isIbmJvm()) {
            return new String[]{"TLSv1.2"};
        } else if (jdkSupportsTLSProtocol("TLSv1.3")) {
            return new String[]{"TLSv1.2", "TLSv1.3"};
        } else {