public function getKeysWithPrefix($prefix)
    {
        $prefix = trim($prefix);
        if (!$prefix) {
            return [];
        }
        $lastIndex = strlen($prefix) - 1;
        $lastChar = $prefix[$lastIndex];
        $nextAsciiCode = ord($lastChar) + 1;
        $rangeEnd = $prefix;
        $rangeEnd[$lastIndex] = chr($nextAsciiCode);

        return $this->get($prefix, ['range_end' => $rangeEnd]);
    }