import { serialize } from "https://deno.land/x/masx200_leetcode_test@9.0.3/serialize-and-deserialize-binary-tree/index.ts";
Parameters
root: TreeNode | null
import { serialize } from "https://deno.land/x/masx200_leetcode_test@9.0.3/serialize-and-deserialize-binary-tree/index.ts";