private V value;
      private Throwable exception;

      /*
       * Acquisition succeeds if the future is done, otherwise it fails.
       */
      @Override
      protected int tryAcquireShared(int ignored) {
        if (isDone()) {
          return 1;
        }
        return -1;
      }

      /*
       * We always allow a release to go through, this means the state has been

     * q-quantile.
     *
     * @param indexes the quantile indexes, each of which must be in the inclusive range [0, q] for
     *     q-quantiles; the order of the indexes is unimportant, duplicates will be ignored, and the
     *     set will be snapshotted when this method is called
     * @throws IllegalArgumentException if {@code indexes} is empty
     */
    public ScaleAndIndexes indexes(int... indexes) {

    @Keep public static final WithPublicConstants SECOND = new WithPublicConstants();
  }

  private static class FirstConstantIsNull {
    // To test that null constant is ignored
    @Keep public static final @Nullable FirstConstantIsNull FIRST = null;

    @Keep public static final FirstConstantIsNull SECOND = new FirstConstantIsNull();
  }

  public static class NonFinalFieldIgnored {

    checkNotNull(throwable);

    if (allMustSucceed) {
      // As soon as the first one fails, make that failure the result of the output future.
      // The results of all other inputs are then ignored (except for logging any failures).
      boolean completedWithFailure = setException(throwable);
      if (!completedWithFailure) {
        // Go up the causal chain to see if we've already seen this cause; if we have, even if

  }

  /** Waiter links form a Treiber stack in {@link #waitersField}. */
  static final class Waiter {
    static final Waiter TOMBSTONE = new Waiter(false /* ignored param */);

    volatile @Nullable Thread thread;
    volatile @Nullable Waiter next;

    /**
     * Constructor for the TOMBSTONE, avoids use of ATOMIC_HELPER in case this class is loaded

    assertEquals(4, stats.missCount());
    assertEquals(4, stats.loadSuccessCount());
    assertEquals(0, stats.loadExceptionCount());
    assertEquals(3, stats.hitCount());

    // duplicate keys are ignored, and don't impact stats
    assertEquals(ImmutableMap.of(4, 4, 5, 5), cache.getAll(asList(4, 5)));
    stats = cache.stats();
    assertEquals(5, stats.missCount());
    assertEquals(5, stats.loadSuccessCount());

    @Keep public static final WithPublicConstants SECOND = new WithPublicConstants();
  }

  private static class FirstConstantIsNull {
    // To test that null constant is ignored
    @Keep public static final @Nullable FirstConstantIsNull FIRST = null;

    @Keep public static final FirstConstantIsNull SECOND = new FirstConstantIsNull();
  }

  public static class NonFinalFieldIgnored {

  }

  private static void writeSelfReferencingJarFile(File jarFile, String... entries)
      throws IOException {
    Manifest manifest = new Manifest();
    // Without version, the manifest is silently ignored. Ugh!
    manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
    manifest.getMainAttributes().put(Attributes.Name.CLASS_PATH, jarFile.getName());

    Closer closer = Closer.create();
    try {

  }

  /** Waiter links form a Treiber stack in {@link #waitersField}. */
  static final class Waiter {
    static final Waiter TOMBSTONE = new Waiter(false /* ignored param */);

    volatile @Nullable Thread thread;
    volatile @Nullable Waiter next;

    /**
     * Constructor for the TOMBSTONE, avoids use of ATOMIC_HELPER in case this class is loaded

            throw IOException("PROTOCOL_ERROR SETTINGS_MAX_FRAME_SIZE: $value")
          }
        }

        // SETTINGS_MAX_HEADER_LIST_SIZE
        6 -> { // Advisory only, so ignored.
        }

        // Must ignore setting with unknown id.
        else -> {
        }
      }
      settings[id] = value
    }
    handler.settings(false, settings)
  }