Pinq\Iterators\Common\OrderedMap::loadLargestIntKey PHP Method

    private function loadLargestIntKey()
    {
        $this->largestIntKey = -1;
        foreach ($this->keys as $key) {
            if (is_int($key) && $key > $this->largestIntKey) {
                $this->largestIntKey = $key;
            }
        }
    }