public final void doesNotContainEntry(@Nullable Object key, @Nullable Object value) {
    checkNoNeedToDisplayBothValues("entrySet()")
        .that(checkNotNull(actual).entrySet())
        .doesNotContain(immutableEntry(key, value));
  }
@Test
  public void doesNotContainEntry() {
    ImmutableMap<String, String> actual = ImmutableMap.of("kurt", "kluever");
    assertThat(actual).doesNotContainEntry("greg", "kick");
    assertThat(actual).doesNotContainEntry(null, null);
    assertThat(actual).doesNotContainEntry("kurt", null);
    assertThat(actual).doesNotContainEntry(null, "kluever");
  }