() ->
            Stream.of(immutableCell("one", "uno", 1), immutableCell("one", "uno", 2))
                .collect(collector));
  }

  // https://youtrack.jetbrains.com/issue/KT-58242/. Crash when rowFunction result (null) is unboxed
  @J2ktIncompatible
  public void testToImmutableTableNullRowKey() {
    Collector<Cell<String, String, Integer>, ?, ImmutableTable<String, String, Integer>> collector =