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fun <T> List<T>.partitionIndexed(predicate: (Int, T) -> Boolean): Pair<List<T>, List<T>> {
    val first = mutableListOf<T>()
    val second = mutableListOf<T>()
    for ((index, element) in this.withIndex()) {
        if (predicate(index, element)) {
            first.add(element)
        } else {
            second.add(element)
        }
    }
    return Pair(first, second)
    
}