lodash group按键嵌套对象的数组

I have the following data:

我有以下数据：

  var data = {
  "features": [
    {
      "properties": {
        "route_id": 522,
        "name": "the Mekong",
        "tour_id": 538
      }
    },{
      "properties": {
        "route_id": 522,
        "name": "Cambodia & the Mekong",
        "tour_id": 545
      }
    },{
      "properties": {
        "route_id": 521,
        "name": "Cambodia",
        "tour_id": 537
      }
    }
  ]
}
  var da