写一个方法，实现树的路径查询

 function findPathById(id, Tree) {    let res = []    function get(tree, arr = []) {      Array.isArray(tree) && tree.forEach(val => {        let arrX = JSON.parse(JSON.stringify(arr)) //拷贝一下数组        arrX.push(val.name)        val.id === id ? (res = arrX) : val.children && get(val.children, arrX)      })    }    get([Tree])    return res.join(",")  }  const str = findPathById(4, Tree)