Pinq\Iterators\Standard\OrderedMap::doFetch PHP Method

    protected function doFetch()
    {
        $position =& $this->position;
        if (isset($this->keys[$position]) || array_key_exists($position, $this->keys)) {
            $element = [$this->keys[$position], &$this->values[$position]];
            $position++;
            return $element;
        }
    }