}
  }

  private static <T extends @Nullable Object> void successor(AvlNode<T> a, AvlNode<T> b) {
    a.succ = b;
    b.pred = a;
  }

  private static <T extends @Nullable Object> void successor(
      AvlNode<T> a, AvlNode<T> b, AvlNode<T> c) {
    successor(a, b);
    successor(b, c);
  }

  /*

    }
  }

  private static <T extends @Nullable Object> void successor(AvlNode<T> a, AvlNode<T> b) {
    a.succ = b;
    b.pred = a;
  }

  private static <T extends @Nullable Object> void successor(
      AvlNode<T> a, AvlNode<T> b, AvlNode<T> c) {
    successor(a, b);
    successor(b, c);
  }

  /*

    values[size] = value;

    insertIntoTableKToV(size, keyHash);
    insertIntoTableVToK(size, valueHash);

    int successor =
        (predecessor == ENDPOINT) ? firstInInsertionOrder : nextInInsertionOrder[predecessor];
    setSucceeds(predecessor, size);
    setSucceeds(size, successor);
    size++;
    modCount++;
    return null;
  }

  /**

          TimeoutsToUse.ANY,
          Outcome.SUCCESS);
      addTests(
          suite,
          method,
          Scenario.UNSATISFIED_AND_UNOCCUPIED_BEFORE_ENTERING,
          TimeoutsToUse.FINITE,
          isGuarded(method)
              ? (isBoolean(method) ? Outcome.FAILURE : Outcome.HANG)
              : Outcome.SUCCESS);
      addTests(
          suite,
          method,

    List<Callable<String>> l = new ArrayList<>();
    l.add(new NPETask());
    try {
      invokeAnyImpl(e, l, false, 0, NANOSECONDS);
      fail();
    } catch (ExecutionException success) {
      assertThat(success).hasCauseThat().isInstanceOf(NullPointerException.class);
    } finally {
      joinPool(e);
    }
  }

  /** invokeAny(c) returns result of some task in c if at least one completes */

        });
        refresh();
    }

    /**
     * Indexes suggest data from documents.
     *
     * @param success A callback for successful indexing.
     * @param error   A callback for indexing errors.
     */
    public void indexFromDocuments(final Consumer<Boolean> success, final Consumer<Throwable> error) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

    List<Callable<String>> l = new ArrayList<>();
    l.add(new NPETask());
    try {
      invokeAnyImpl(e, l, false, 0, NANOSECONDS);
      fail();
    } catch (ExecutionException success) {
      assertThat(success).hasCauseThat().isInstanceOf(NullPointerException.class);
    } finally {
      joinPool(e);
    }
  }

  /** invokeAny(c) returns result of some task in c if at least one completes */

      } catch (NoSuchElementException success) {
      }
      try {
        q.iterator().next();
        fail("Should throw exception");
      } catch (NoSuchElementException success) {
      }
      try {
        q.remove();
        fail("Should throw exception");
      } catch (NoSuchElementException success) {
      }
    } catch (InterruptedException ie) {

  protected static final int SLOW_OUTPUT_VALID_INPUT_DATA = 2;
  protected static final int SLOW_FUNC_VALID_INPUT_DATA = 3;
  private static final String RESULT_DATA = "SUCCESS";

  private SettableFuture<String> outputFuture;
  // Signals that the function is waiting to complete
  private CountDownLatch funcIsWaitingLatch;
  // Signals the function so it will complete

  protected static final int SLOW_OUTPUT_VALID_INPUT_DATA = 2;
  protected static final int SLOW_FUNC_VALID_INPUT_DATA = 3;
  private static final String RESULT_DATA = "SUCCESS";

  private SettableFuture<String> outputFuture;
  // Signals that the function is waiting to complete
  private CountDownLatch funcIsWaitingLatch;
  // Signals the function so it will complete