proc capLen[T](s: var seq[T]; length: int) {....raises: [].}

proc take[T](s: seq[T]; n: int): seq[T] {....raises: [].}

proc toChunks[T](data: seq[T]; size: int): seq[seq[T]] {....raises: [], raises: [].}

template exclIfIt[T](set: var HashSet[T]; condition: untyped) {..}

template filterIt[T](set: HashSet[T]; condition: untyped): HashSet[T] {..}