public function createRequests(array $items, array $regions) {
        foreach($items as $item) {
            foreach ($regions as $region) {
                array_push($this->regionAndItemPairs, [$region, $item]);
                array_push($this->createdRequests, new Request('GET', 'https://crest-tq.eveonline.com/market/'.$region.'/history/?type=https://crest-tq.eveonline.com/inventory/types/' . $item . '/'));
            }
        }
    }