sumOf

context(monoid: Monoid<N>)
fun <E, N> KoneIterator<E>.sumOf(selector: (E) -> N): N(source)

context(monoid: Monoid<N>)
fun <E, N> KoneIterable<E>.sumOf(selector: (E) -> N): N(source)

context(monoid: Monoid<N>)
fun <E, N> KoneSequence<E>.sumOf(selector: (E) -> N): N(source)