SingletonPrimitiveSpliteratorOfLong implements Spliterator.OfLong { @Override public OfLong trySplit() { return null; } SingletonPrimitiveSpliteratorOfLong(long element); @Override OfLong trySplit(); @Override boolean tryAdvance(LongConsumer consumer); @Override void forEachRemaining(LongConsumer consumer); @Override long estimateSize(); @Override int characteristics();  }
@Test void trySplit() { assertNull(instance.trySplit()); }