LongCollectorImpl implements LongCollector<A, R> { @Override public Function<A, R> finisher() { return finisher; } LongCollectorImpl(
            final Supplier<A> supplier,
            final ObjLongConsumer<A> accumulator,
            final BinaryOperator<A> combiner,
            final Function<A, R> finisher,
            final Set<Collector.Characteristics> characteristics); @Override Supplier<A> supplier(); @Override ObjLongConsumer<A> accumulator(); @Override BinaryOperator<A> combiner(); @Override Function<A, R> finisher(); @Override Set<Collector.Characteristics> characteristics();  }
@Test void finisher() { assertSame(FINISHER, COLLECTOR.finisher()); }