public function set(int $index, $value): bool
    {
        return $this->redis->lset($this->key, $index, $this->serialize($value));
    }
public function set(int $index, $value): bool
    {
        return $this->redis->lset($this->key, $index, $this->serialize($value));
    }
@param int   $index Item at this index...
@param mixed $value ...will be set to this value.

@return bool True on success. False otherwise.