graph.putEdgeValue(5, 6, "C");

    int threadCount = 20;
    ExecutorService executor = newFixedThreadPool(threadCount);
    CyclicBarrier barrier = new CyclicBarrier(threadCount);
    ImmutableList.Builder<Future<?>> futures = ImmutableList.builder();
    for (int i = 0; i < threadCount; i++) {
      futures.add(
          executor.submit(
              () -> {
                barrier.await();

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val executor = Executors.newScheduledThreadPool(1)
      private val client = OkHttpClient()

      fun run() {
        val request = Request.Builder()

import static com.google.common.collect.CollectPreconditions.checkNonnegative;
import static com.google.common.collect.Lists.newArrayListWithExpectedSize;
import static java.util.concurrent.Executors.newFixedThreadPool;

import com.google.caliper.BeforeExperiment;
import com.google.caliper.Benchmark;
import com.google.caliper.Param;
import com.google.common.annotations.VisibleForTesting;

          public String get(long time, TimeUnit unit) {
            throw new CancellationException(); // BAD!!
          }

          @Override
          public void addListener(Runnable runnable, Executor executor) {
            executor.execute(runnable);
          }
        };
    future.setFuture(badFuture);
    ExecutionException expected = getExpectingExecutionException(future);

import java.security.cert.Certificate
import java.security.cert.X509Certificate
import java.time.Duration
import java.time.Instant
import java.util.Date
import java.util.concurrent.ExecutorService
import java.util.concurrent.Executors
import java.util.concurrent.TimeUnit
import javax.net.ServerSocketFactory
import javax.net.SocketFactory
import javax.net.ssl.HostnameVerifier
import javax.net.ssl.SSLContext
import javax.net.ssl.SSLSocket

    graph.putEdgeValue(5, 6, "C");

    int threadCount = 20;
    ExecutorService executor = newFixedThreadPool(threadCount);
    CyclicBarrier barrier = new CyclicBarrier(threadCount);
    ImmutableList.Builder<Future<?>> futures = ImmutableList.builder();
    for (int i = 0; i < threadCount; i++) {
      futures.add(
          executor.submit(
              () -> {
                barrier.await();

        Path changingFile = dirToDelete.resolve("j/l");
        Path symlinkTarget = fs.getPath("/dontdelete");

        ExecutorService executor = newSingleThreadExecutor();
        Future<?> switcher = startDirectorySymlinkSwitching(changingFile, symlinkTarget, executor);

        try {
          for (int i = 0; i < iterations; i++) {
            try {
              Files.createDirectories(changingFile);

        Path changingFile = dirToDelete.resolve("j/l");
        Path symlinkTarget = fs.getPath("/dontdelete");

        ExecutorService executor = newSingleThreadExecutor();
        Future<?> switcher = startDirectorySymlinkSwitching(changingFile, symlinkTarget, executor);

        try {
          for (int i = 0; i < iterations; i++) {
            try {
              Files.createDirectories(changingFile);

    private final Map<String, Integer> keyVersions = new ConcurrentHashMap<>();
    private final java.util.concurrent.ScheduledExecutorService rotationScheduler =
            java.util.concurrent.Executors.newSingleThreadScheduledExecutor(r -> {
                Thread t = new Thread(r, "SecureKeyManager-Rotation");
                t.setDaemon(true);
                return t;
            });

    ClosingFuture<String> closingFuture =
        ClosingFuture.from(executor.submit(Callables.returning(closeable1)))
            .transform(
                (DeferredCloser closer, TestCloseable v) -> {
                  assertThat(v).isSameInstanceAs(closeable1);
                  return "value";
                },
                executor);
    assertThat(getFinalValue(closingFuture)).isEqualTo("value");