Lodash keyBy与数组具有相同的属性

阵列中有几个对象:

"surcharges": [
    {
        "supplier": "XXXXX",
        "name": "over_pkg_0",
        "amount": 230
    },
    {
        "supplier": "XXXXX",
        "name": "over_pkg_1",
        "amount": 54
    },
    {
        "supplier": "YYYYY",
        "name": "over_pkg_0",
        "amount": 25
    },
    {
        "supplier": "YYYYY",
        "name": "over_pkg_1",
        "amount": 25
    }
];

我希望使用lodash获得以下结果:

"surcharges": [
    {
        "XXXXX": [
            {
                "name": "over_pkg_0",
                "amount": 230
            },
            {
                "name": "over_pkg_1",
                "amount": 54
            }
        ],
    },
    {
        "YYYYY": [
            {
                "name": "over_pkg_0",
                "amount": 25
            },
            {
                "name": "over_pkg_1",
                "amount": 25
            }
        ],
    }
];

我可以生成类似的东西,但这些键正在合并,我无法将它们做成数组。也许我应该用 _.concat 在链条的某个地方,但我不知道怎么做。

已尝试使用:

var finalsurcharges = _.chain(surcharges)
  .keyBy('supplier')
  .mapValues(v => _.omit(v, 'supplier'))
  .value();

产生:

"finalsurcharges": {
    "XXXXX": {
        "name": "over_pkg_1",
        "amount": 54
    },
    "YYYYY": {
        "name": "over_pkg_1",
        "amount": 25
    }
}