for (int i = 0; i < objectsNum; i++) {
          objects.add(new Object());
        }

        Iterable<?> locks = striped.bulkGet(objects);
        assertTrue(Ordering.natural().onResultOf(Functions.forMap(indexByLock)).isOrdered(locks));

        // check idempotency
        Iterable<?> locks2 = striped.bulkGet(objects);
        assertEquals(Lists.newArrayList(locks), Lists.newArrayList(locks2));

        for (int i = 0; i < objectsNum; i++) {
          objects.add(new Object());
        }

        Iterable<?> locks = striped.bulkGet(objects);
        assertTrue(Ordering.natural().onResultOf(Functions.forMap(indexByLock)).isOrdered(locks));

        // check idempotency
        Iterable<?> locks2 = striped.bulkGet(objects);
        assertEquals(Lists.newArrayList(locks), Lists.newArrayList(locks2));

        toImmutableSetMultimap(Entry::getKey, Entry::getValue);
    BiPredicate<ImmutableSetMultimap<?, ?>, ImmutableSetMultimap<?, ?>> equivalence =
        Equivalence.equals()
            .onResultOf(
                (ImmutableSetMultimap<?, ?> mm) ->
                    ImmutableListMultimap.copyOf(mm).asMap().entrySet().asList())
            .and(Equivalence.equals());
    CollectorTester.of(collector, equivalence)

  }

  public void testToImmutableSet() {
    Collector<String, ?, ImmutableSet<String>> collector = toImmutableSet();
    Equivalence<ImmutableSet<String>> equivalence =
        Equivalence.equals().onResultOf(ImmutableSet::asList);
    CollectorTester.of(collector, equivalence)
        .expectCollects(ImmutableSet.of("a", "b", "c", "d"), "a", "b", "a", "c", "b", "b", "d");
  }

        toImmutableSortedSet(Ordering.natural());
    BiPredicate<ImmutableSortedSet<String>, ImmutableSortedSet<String>> equivalence =
        Equivalence.equals()
            .onResultOf(ImmutableSortedSet<String>::comparator)
            .and(Equivalence.equals().onResultOf(ImmutableSortedSet::asList))
            .and(Equivalence.equals());
    CollectorTester.of(collector, equivalence)
        .expectCollects(

    }

    private ImmutableMap<K, V> build(boolean throwIfDuplicateKeys) {
      if (valueComparator != null) {
        Collections.sort(
            entries, Ordering.from(valueComparator).onResultOf(Maps.<V>valueFunction()));
      }
      return fromEntryList(throwIfDuplicateKeys, entries);
    }

    public ImmutableMap<K, V> buildOrThrow() {
      return build(/* throwIfDuplicateKeys= */ true);
    }

  static <C, E extends @Nullable Object, R extends Iterable<E>>
      BiPredicate<C, C> pairwiseOnResultOf(Function<C, R> arg) {
    Equivalence<C> equivalence = Equivalence.equals().<E>pairwise().onResultOf(arg);
    return equivalence::equivalent;
  }

            loadTimes.add(Maps.immutableEntry(service, stopwatch.elapsed(MILLISECONDS)));
          }
        }
      } finally {
        monitor.leave();
      }
      sort(loadTimes, Ordering.natural().onResultOf(Entry::getValue));
      return ImmutableMap.copyOf(loadTimes);
    }

    /**
     * Updates the state with the given service transition.
     *

            localSize = lastEntryForEachKey.length;
          }
        }
        sort(
            nonNullEntries,
            0,
            localSize,
            Ordering.from(valueComparator).onResultOf(Maps.<V>valueFunction()));
        localEntries = (@Nullable Entry<K, V>[]) nonNullEntries;
      }
      entriesUsed = true;
      return RegularImmutableMap.fromEntryArray(localSize, localEntries, throwIfDuplicateKeys);

        entries[i] = new AbstractMap.SimpleImmutableEntry<Object, V>(key, value);
      }
      Arrays.sort(
          entries, 0, size, Ordering.from(valueComparator).onResultOf(Maps.<V>valueFunction()));
      for (int i = 0; i < size; i++) {
        alternatingKeysAndValues[2 * i] = entries[i].getKey();
        alternatingKeysAndValues[2 * i + 1] = entries[i].getValue();
      }
    }