Map<K, V> onBoth = newLinkedHashMap();
    Map<K, MapDifference.ValueDifference<V>> differences = newLinkedHashMap();
    doDifference(left, right, valueEquivalence, onlyOnLeft, onlyOnRight, onBoth, differences);
    return new MapDifferenceImpl<>(onlyOnLeft, onlyOnRight, onBoth, differences);
  }

  /**
   * Computes the difference between two sorted maps, using the comparator of the left map, or

quiet till she got to the part about her repeating `YOU ARE OLD,
FATHER WILLIAM,' to the Caterpillar, and the words all coming
different, and then the Mock Turtle drew a long breath, and said
`That's very curious.'

  `It's all about as curious as it can be,' said the Gryphon.

  `It all came different!' the Mock Turtle repeated
thoughtfully.  `I should like to hear her try and repeat

   * To maintain this code, make a change for the strong reference type. Then, cut and paste, and
   * replace "Strong" with "Soft" or "Weak" within the pasted text. The primary difference is that
   * strong entries store the key reference directly while soft and weak entries delegate to their
   * respective superclasses.
   */

  /** Used for strongly-referenced keys. */

   * To maintain this code, make a change for the strong reference type. Then, cut and paste, and
   * replace "Strong" with "Soft" or "Weak" within the pasted text. The primary difference is that
   * strong entries store the key reference directly while soft and weak entries delegate to their
   * respective superclasses.
   */

  /** Used for strongly-referenced keys. */

    assertSame(oldValue, segment.get(key, hash));
    assertTrue(segment.replace(key, hash, oldValue, newValue));
    assertEquals(1, segment.count);
    assertSame(newValue, segment.get(key, hash));

    // different value
    assertFalse(segment.replace(key, hash, oldValue, newValue));
    assertEquals(1, segment.count);
    assertSame(newValue, segment.get(key, hash));

    // cleared

    assertSame(oldValue, segment.get(key, hash));
    assertTrue(segment.replace(key, hash, oldValue, newValue));
    assertEquals(1, segment.count);
    assertSame(newValue, segment.get(key, hash));

    // different value
    assertFalse(segment.replace(key, hash, oldValue, newValue));
    assertEquals(1, segment.count);
    assertSame(newValue, segment.get(key, hash));

    // cleared

    errorInput.set(0);

    runGetIdempotencyTest(errorComposedFuture, MyError.class);

    /*
     * Try again when the input's value is already filled in, since the flow is
     * slightly different in that case.
     */
    exceptionComposedFuture =
        transform(exceptionInput, newOneTimeExceptionThrower(), directExecutor());
    runGetIdempotencyTest(exceptionComposedFuture, MyRuntimeException.class);

    errorInput.set(0);

    runGetIdempotencyTest(errorComposedFuture, MyError.class);

    /*
     * Try again when the input's value is already filled in, since the flow is
     * slightly different in that case.
     */
    exceptionComposedFuture =
        transform(exceptionInput, newOneTimeExceptionThrower(), directExecutor());
    runGetIdempotencyTest(exceptionComposedFuture, MyRuntimeException.class);

   * DeferredCloser} to capture objects to be closed when the pipeline is done.
   *
   * <p>If this {@code ClosingFuture} succeeds or fails with a different exception type, the
   * function will not be called, and the derived {@code ClosingFuture} will be equivalent to this
   * one.
   *

quiet till she got to the part about her repeating `YOU ARE OLD,
FATHER WILLIAM,' to the Caterpillar, and the words all coming
different, and then the Mock Turtle drew a long breath, and said
`That's very curious.'

  `It's all about as curious as it can be,' said the Gryphon.

  `It all came different!' the Mock Turtle repeated
thoughtfully.  `I should like to hear her try and repeat