assertTrue(Arrays.equals(new String[] {"a"}, array));
  }

  @GwtIncompatible // Iterators.toArray(Iterator, Class)
  public void testToArray() {
    String[] sourceArray = new String[] {"a", "b", "c"};
    Iterator<String> iterator = asList(sourceArray).iterator();
    String[] newArray = Iterators.toArray(iterator, String.class);
    assertTrue(Arrays.equals(sourceArray, newArray));
  }

   * string of size {@code size}, and are in order. A position index may range from zero to {@code
   * size}, inclusive.
   *
   * @param start a user-supplied index identifying a starting position in an array, list or string
   * @param end a user-supplied index identifying an ending position in an array, list or string
   * @param size the size of that array, list or string

                  @Override
                  protected Set<String> create(String[] elements) {
                    SafeTreeSet<String> set = new SafeTreeSet<>(Arrays.asList(elements));
                    return Sets.unmodifiableNavigableSet(set);
                  }

                  @Override
                  public List<String> order(List<String> insertionOrder) {

   * maps ("constant maps"). Example:
   *
   * <pre>{@code
   * static final ImmutableSortedMap<Integer, String> INT_TO_WORD =
   *     new ImmutableSortedMap.Builder<Integer, String>(Ordering.natural())
   *         .put(1, "one")
   *         .put(2, "two")
   *         .put(3, "three")
   *         .buildOrThrow();
   * }</pre>
   *

        throw new InterruptedException();
      }
      remainingNanos = endNanos - System.nanoTime();
    }

    String futureToString = toString();
    final String unitString = unit.toString().toLowerCase(Locale.ROOT);
    String message = "Waited " + timeout + " " + unit.toString().toLowerCase(Locale.ROOT);
    // Only report scheduling delay if larger than our spin threshold - otherwise it's just noise

    assertTrue(Arrays.equals(new String[] {"a"}, array));
  }

  @GwtIncompatible // Iterators.toArray(Iterator, Class)
  public void testToArray() {
    String[] sourceArray = new String[] {"a", "b", "c"};
    Iterator<String> iterator = asList(sourceArray).iterator();
    String[] newArray = Iterators.toArray(iterator, String.class);
    assertTrue(Arrays.equals(sourceArray, newArray));
  }

   *
   * <pre>{@code
   * Multimap<String, Integer> multimap =
   *     ImmutableMultimap.of("a", 1, "a", 4, "b", 6);
   * EntryTransformer<String, Integer, String> transformer =
   *     new EntryTransformer<String, Integer, String>() {
   *       public String transformEntry(String key, Integer value) {
   *         return key + value;
   *       }
   *     };
   * Multimap<String, String> transformed =

   * cast, for example:
   *
   * <pre>{@code
   * Set<Object> aFewBadObjects = ...
   * Set<String> manyBadStrings = ...
   *
   * // impossible for a non-String to be in the intersection
   * SuppressWarnings("unchecked")
   * Set<String> badStrings = (Set) Sets.intersection(
   *     aFewBadObjects, manyBadStrings);
   * }</pre>
   *

    }

    Object delegate() {
      return delegate;
    }

    // No equals and hashCode; see ForwardingObject for details.

    @Override
    public String toString() {
      synchronized (mutex) {
        return delegate.toString();
      }
    }

    // Serialization invokes writeObject only when it's private.
    // The SynchronizedObject subclasses don't need a writeObject method since

        callback.onFailure(e);
        return;
      }
      callback.onSuccess(value);
    }

    @Override
    public String toString() {
      return MoreObjects.toStringHelper(this).addValue(callback).toString();
    }
  }

  /**
   * Returns the result of the input {@code Future}, which must have already completed.
   *