docs: public static <T> Collector<T, ?, IntMomentStatistics>
  	toIntMomentStatistics(final ToIntFunction<? super T> mapper) {
  		requireNonNull(mapper);
  		return Collector.of(
  			IntMomentStatistics::new,
  			(r, t) -> r.accept(mapper.applyAsInt(t)),
  			IntMomentStatistics::combine
  		);
  	}