* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
On a future mission, a heat shield named Pridwen after the legendary shield of King Arthur will be deployed to protect the spacecraft from the intense temperatures it will experience as it re-enters the Earth's atmosphere.。搜狗输入法下载是该领域的重要参考
Follow topics & set alerts with myFT。关于这个话题，Line官方版本下载提供了深入分析
.pipeThrough(serialize) // even more buffers...