SOURCE

const json = [
    {
        "id": 153612,
        "children": [
            {
                "id": 198291,
                "children": [
                    {
                        "id": 225027,
                        "children": [],
                    }
                ]
            }
        ]
    }
];
      
findNodeById(id, arr) {
    const { dataSource } = this.props;
    const loop = (arr) => {
        if (arr.length === 0) {
            return;
        }
        arr.forEach(v => {
            if (v.id === id) {
                return v.children;
            }
            loop(v.children);
        });
    };
  loop(arr);
}

var r = findNodeById(198291, json);