public function getEntryRange($first, $last) {
        if($last < $first) {
            throw new SteamCondenserException('First entry must be prior to last entry for leaderboard entry lookup.');
        }
        if(($last - $first) > 5000) {
            throw new SteamCondenserException('Leaderboard entry lookup is currently limited to a maximum of 5001 entries per request.');
        }

        $xml = $this->loadData(['start' => $first, 'end' => $last]);

        return $this->parseEntries($xml);
    }