{
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  "children": [
    {
      "第 1 步：记得行为参数化": {
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      "第 2 步：使用函数式接口来传递行为": {
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        "children": [],
        "node_id": "569d5e11c4fc5de7844053d9a733c5e8"
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      "第 3 步：执行一个行为": {
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    {
      "第 4 步：传递Lambda": {
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