code: public function offsetUnset($offset): void
      {
          if ($this->offsetExists($offset)) {
              $unique = uniqid('RedisObjects-DELETED_', true);
              // There is no serialization here for obvious reasons.
              $this->redis->lset($this->key, $offset, $unique);
              // Also, this is sadly the only way to unset a specific index.
              $this->redis->lrem($this->key, 1, $unique);
          }
      }
docs: {@inheritDoc}