fn test_array_of_option_array() {
    mut arr := []?[]int{}

    arr1 := []int{}
    arr << arr1

    arr2 := [1, 2, 3]
    arr << arr2

    arr << none

    println(arr)

    for i, item in arr {
        if arr_item := item {
            if i == 0 {
                assert arr_item == []
            } else if i == 1 {
                assert arr_item == [1, 2, 3]
            }
        } else {
            assert item == none
        }
    }

    assert arr.len == 3
    assert '${arr[0]}' == 'Option([])'
    assert '${arr[1]}' == 'Option([1, 2, 3])'
    assert '${arr[2]}' == 'Option(none)'
}