throws ExecutionException {
    try {
      return future.get();
    } catch (InterruptedException e) {
      // Should never be thrown in GWT but play it safe
      throw new IllegalStateException(e);
    }
  }

            return callable.call();
          }

          @Override
          public String toString() {
            return callable.toString();
          }
        };
    /*
     * Four futures are at play here:
     * taskFuture is the future tracking the result of the callable.
     * newFuture is a future that completes after this and all prior tasks are done.
     * oldFuture is the previous task's newFuture.

letter, nearly as large as himself, and this he handed over to
the other, saying, in a solemn tone, `For the Duchess.  An
invitation from the Queen to play croquet.'  The Frog-Footman
repeated, in the same solemn tone, only changing the order of the
words a little, `From the Queen.  An invitation for the Duchess
to play croquet.'

  Then they both bowed low, and their curls got entangled
together.

letter, nearly as large as himself, and this he handed over to
the other, saying, in a solemn tone, `For the Duchess.  An
invitation from the Queen to play croquet.'  The Frog-Footman
repeated, in the same solemn tone, only changing the order of the
words a little, `From the Queen.  An invitation for the Duchess
to play croquet.'

  Then they both bowed low, and their curls got entangled
together.

    for (int i = 0; i < reps; i++) {
      Integer key = keys.get(random.nextInt(nKeys));
      // This range is [-5, 4] - slight negative bias so we often hit zero, which brings the
      // auto-removal of zeroes into play.
      int delta = random.nextInt(10) - 5;
      blah += delta;
      if (delta >= 0) {
        multiset.add(key, delta);
      } else {
        multiset.remove(key, -delta);
      }
    }

    for (int i = 0; i < reps; i++) {
      Integer key = keys.get(random.nextInt(nKeys));
      // This range is [-5, 4] - slight negative bias so we often hit zero, which brings the
      // auto-removal of zeroes into play.
      int delta = random.nextInt(10) - 5;
      blah += delta;
      if (delta >= 0) {
        multiset.add(key, delta);
      } else {
        multiset.remove(key, -delta);
      }
    }

        if (array[min] > array[index]) {
          min = index;
        }
      }
      if (min != from) {
        swap(array, min, from);
      }
      return;
    }

    // Let's play quickselect! We'll repeatedly partition the range [from, to] containing the
    // required element, as long as it has more than one element.
    while (to > from) {
      int partitionPoint = partition(array, from, to);

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