docs: public static <T> Collector<T, ?, LongMomentStatistics>
  	toLongMomentStatistics(final ToLongFunction<? super T> mapper) {
  		requireNonNull(mapper);
  		return Collector.of(
  			LongMomentStatistics::new,
  			(r, t) -> r.accept(mapper.applyAsLong(t)),
  			LongMomentStatistics::combine
  		);
  	}