}

  public void testTransform_absent() {
    assertEquals(Optional.absent(), Optional.absent().transform(Functions.identity()));
    assertEquals(Optional.absent(), Optional.absent().transform(Functions.toStringFunction()));
  }

  public void testTransform_presentIdentity() {
    assertEquals(Optional.of("a"), Optional.of("a").transform(Functions.identity()));
  }

  public void testLast() {
    assertEquals(c.getKey(), navigableMap.lastKey());
  }

  @CollectionSize.Require(absent = ZERO)
  public void testHeadMapExclusive() {
    assertFalse(navigableMap.headMap(a.getKey()).containsKey(a.getKey()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testTailMapInclusive() {
    assertTrue(navigableMap.tailMap(a.getKey()).containsKey(a.getKey()));
  }

  public void testLast() {
    assertEquals(c.getKey(), navigableMap.lastKey());
  }

  @CollectionSize.Require(absent = ZERO)
  public void testHeadMapExclusive() {
    assertFalse(navigableMap.headMap(a.getKey()).containsKey(a.getKey()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testTailMapInclusive() {
    assertTrue(navigableMap.tailMap(a.getKey()).containsKey(a.getKey()));
  }

provide OkHttp with an HTTP request, you’re describing the request at a high-level: _“fetch me this URL with these headers.”_ For correctness and efficiency, OkHttp rewrites your request before transmitting it.

OkHttp may add headers that are absent from the original request, including `Content-Length`, `Transfer-Encoding`, `User-Agent`, `Host`, `Connection`, and `Content-Type`. It will add an `Accept-Encoding` header for transparent response compression unless the header is already present....

        missingFeatures.removeAll(features);
        logger.finer(
            Platform.format(
                "%s: skipping because these features are absent: %s", method, missingFeatures));
      }
      return false;
    }
    if (intersect(features, requirements.getAbsentFeatures())) {
      if (logger.isLoggable(FINER)) {

    // count == 1
    segment.count++;
    assertThat(segment.get(key, hash)).isEqualTo(value);
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    // don't see absent values now that count > 0
    assertThat(segment.get(new Object(), hash)).isNull();

    // null key
    InternalEntry<Object, Object, ?> nullEntry = segment.newEntryForTesting(null, hash, entry);

    // count == 1
    segment.count++;
    assertThat(segment.get(key, hash)).isEqualTo(value);
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    // don't see absent values now that count > 0
    assertThat(segment.get(new Object(), hash)).isNull();

    // null key
    InternalEntry<Object, Object, ?> nullEntry = segment.newEntryForTesting(null, hash, entry);

    segment.count++;
    assertThat(segment.get(key, hash)).isSameInstanceAs(value);
    assertThat(segment.containsKey(key, hash)).isTrue();
    assertThat(segment.containsValue(value)).isTrue();
    // don't see absent values now that count > 0
    assertThat(segment.get(new Object(), hash)).isNull();

    // null key
    DummyEntry<Object, Object> nullEntry = DummyEntry.create(null, hash, entry);

    segment.count++;
    assertThat(segment.get(key, hash)).isSameInstanceAs(value);
    assertThat(segment.containsKey(key, hash)).isTrue();
    assertThat(segment.containsValue(value)).isTrue();
    // don't see absent values now that count > 0
    assertThat(segment.get(new Object(), hash)).isNull();

    // null key
    DummyEntry<Object, Object> nullEntry = DummyEntry.create(null, hash, entry);

        missingFeatures.removeAll(features);
        logger.finer(
            Platform.format(
                "%s: skipping because these features are absent: %s", method, missingFeatures));
      }
      return false;
    }
    if (intersect(features, requirements.getAbsentFeatures())) {
      if (logger.isLoggable(FINER)) {