"- change formatting or whitespace unless absolutely required.",
                "Only change what must be changed. The goal is to minimize diffs for easier human review.",

For example, Go 1.21 introduces the `panicnil` setting,
controlling whether `panic(nil)` is allowed;
it defaults to `panicnil=0`, making `panic(nil)` a run-time error.
Using `panicnil=1` restores the behavior of Go 1.20 and earlier.

When compiling a work module or workspace that declares
an older Go version, the Go toolchain amends its defaults
to match that older Go version as closely as possible.

            return hashBytes(input.toString().getBytes(charset));
          }
          i++;
          buffer |= codePointToFourUtf8Bytes(codePoint) << shift;
          if (supplementaryPlaneFix) { // bug compatibility: earlier versions did not have this add
            shift += 32;
          }
          len += 4;
        }

        if (shift >= 32) {
          int k1 = mixK1((int) buffer);
          h1 = mixH1(h1, k1);

 * assertEquals(TypeToken.of(String.class), invokable.getReturnType()); // Not Object.class!
 * assertEquals(new TypeToken<List<String>>() {}, invokable.getOwnerType());
 * }
 *
 * <p><b>Note:</b> earlier versions of this class inherited from {@link
 * java.lang.reflect.AccessibleObject AccessibleObject} and {@link
 * java.lang.reflect.GenericDeclaration GenericDeclaration}. Since version 31.0 that is no longer

   *
   * <p>When the underlying delegate throws an exception then this memoizing supplier will keep
   * delegating calls until it returns valid data.
   *
   * <p>If {@code delegate} is an instance created by an earlier call to {@code memoize}, it is
   * returned directly.
   */
  public static <T extends @Nullable Object> Supplier<T> memoize(Supplier<T> delegate) {
    if (delegate instanceof NonSerializableMemoizingSupplier

   *
   * <p>When the underlying delegate throws an exception then this memoizing supplier will keep
   * delegating calls until it returns valid data.
   *
   * <p>If {@code delegate} is an instance created by an earlier call to {@code memoize}, it is
   * returned directly.
   */
  public static <T extends @Nullable Object> Supplier<T> memoize(Supplier<T> delegate) {
    if (delegate instanceof NonSerializableMemoizingSupplier

 * java.lang.ref.Cleaner Cleaner}; see example <a href="#cleaner">below</a>.
 *
 * <p>Keep a strong reference to this object until all of the associated referents have been
 * finalized. If this object is garbage collected earlier, the backing thread will not invoke {@code
 * finalizeReferent()} on the remaining references.
 *
 * <p>As an example of how this is used, imagine you have a class {@code MyServer} that creates a

    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();
                Integer first = graph.nodes().iterator().next();

    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();
                Integer first = graph.nodes().iterator().next();

 * java.lang.ref.Cleaner Cleaner}; see example <a href="#cleaner">below</a>.
 *
 * <p>Keep a strong reference to this object until all of the associated referents have been
 * finalized. If this object is garbage collected earlier, the backing thread will not invoke {@code
 * finalizeReferent()} on the remaining references.
 *
 * <p>As an example of how this is used, imagine you have a class {@code MyServer} that creates a