expectMissing(mapEntry(getKeyForNullValue(), (V) null));
    assertGet(getKeyForNullValue(), ImmutableList.<V>of());
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_KEY_QUERIES})
  public void testRemoveNullKeyAbsent() {
    assertFalse(multimap().remove(null, v0()));
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUE_QUERIES})
  public void testRemoveNullValueAbsent() {