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);

- Fix issues where server side apply patches operations incorrectly treat empty arrays and maps as absent.
  Fix issue where client-go's `Extract{TypeName}()` and `Extract{TypeName}From() functions incorrectly treat empty arrays and maps as absent.