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import { TreeNode } from "../binary-tree-inorder-traversal/TreeNode.ts";import { Signal } from "./index.ts";
export function inorder(    root: TreeNode | null,    output: (a: number) => void,    signal?: Signal,) {    if (signal?.aborted) return;    if (!root) return;    inorder(root.left, output, signal);    if (signal?.aborted) return;    output(root.val);    inorder(root.right, output, signal);}