void** allocateArray2D(size_t elementSize, size_t subarrays, size_t* elementCounts)
{
    (void)subarrays;
    void *array;
    unsigned long **arr;
    array = calloc(elementSize, sizeof(void*));
    if (!array) {
        return NULL;
    }
    arr = (unsigned long**)array;
    for (size_t i = 0; i < elementSize; ++i) {
        arr[i] = malloc(elementCounts[i]);
        if (!arr[i]) {
            return NULL;
        }
        memset(arr[i], 0, elementCounts[i]);
    }
    return (void**)array;
}