``` IntStreamEx.range(0, customersModels.size) ...

# announcements

[mike_shysh]

IntStreamEx.range(0, customersModels.size)
            .boxed()
            .map {i -> Pair(customersModels.get(i), customerNumbers.getOrElse(i) {1})}
            .toList()
            .forEach {
                repeat(it.second, { addCustomer(it.first) }) <<<< it is a Number =( Seems it refers to first element in Pair
            }