我有一个值events列表列表列表列表

我有一个值事件，它是一个带有如下地图的列表列表：

[
    [
        {
            "packageId": "2721",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 831,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        }
    ],
    [
        {
            "packageId": "2738",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 832,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        }
    ],
    [
        {
            "packageId": "2721",
            "eventTime": "2022-03-20T16:25:00Z",
            "type": "deviated-manually-overridden",
            "id": 842,
            "createdAt": "2022-03-20T16:26:00.363630Z",
            "createdBy": "47"
        },
        {

            "packageId": "2721",
            "eventTime": "2022-03-20T16:38:00Z",
            "type": "deviated-manually-overridden",
            "id": 844,
            "createdAt": "2022-03-20T16:38:46.352751Z",
            "createdBy": "47"
        },
        {
            "packageId": "2721",
            "eventTime": "2022-03-20T20:31:00Z",
            "type": "collected-manually-overridden",
            "id": 846,
            "createdAt": "2022-03-20T20:32:18.046346Z",
            "createdBy": "47"
        },
        {
            "packageId": "2721",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 829,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        }
    ],
    [
        {
            "packageId": "2738",
            "eventTime": "2022-03-20T16:25:00Z",
            "type": "deviated-manually-overridden",
            "id": 843,
            "createdAt": "2022-03-20T16:26:00.363630Z",
            "createdBy": "47"

        },
        {
            "packageId": "2738",
            "eventTime": "2022-03-20T16:38:00Z",
            "type": "deviated-manually-overridden",
            "id": 845,
            "createdAt": "2022-03-20T16:38:46.352751Z",
            "createdBy": "47"
        },
        {
            "packageId": "2738",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 830,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        }
    ],
    [
        {
            "packageId": "2721",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 833,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        }
    ],
    [
        {
            "packageId": "2738",
            "eventTime": "2022-03-15T11:24:12.200864Z",

            "type": "created",
            "id": 834,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        }
    ]
]

我想通过地图的 packageId 将此列表分组为一个列表，以便具有相同 packageId 的每个地图都是列表的一部分。同时，我还想过滤掉具有相同packageId、type和eventTime的映射，这样我就只有一个字段值相同的映射。我想要实现的是：

[
    [
        {
            "packageId": "2721",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 831,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        },
        {
            "packageId": "2721",
            "eventTime": "2022-03-20T16:25:00Z",
            "type": "deviated-manually-overridden",
            "id": 842,
            "createdAt": "2022-03-20T16:26:00.363630Z",
            "createdBy": "47"
        },
        {
            "packageId": "2721",
            "eventTime": "2022-03-20T16:38:00Z",
            "type": "deviated-manually-overridden",
            "id": 844,

            "createdAt": "2022-03-20T16:38:46.352751Z",
            "createdBy": "47"
        },
        {
            "packageId": "2721",
            "eventTime": "2022-03-20T20:31:00Z",
            "type": "collected-manually-overridden",
            "id": 846,
            "createdAt": "2022-03-20T20:32:18.046346Z",
            "createdBy": "47"
        }
    ],
    [
        {
            "packageId": "2738",
            "eventTime": "2022-03-15T11:24:12.200864Z",
            "type": "created",
            "id": 832,
            "createdAt": "2022-03-15T11:24:12.200864Z",
            "createdBy": "47"
        },
        {
            "packageId": "2738",
            "eventTime": "2022-03-20T16:25:00Z",
            "type": "deviated-manually-overridden",
            "id": 843,
            "createdAt": "2022-03-20T16:26:00.363630Z",
            "createdBy": "47"
        },
        {
            "packageId": "2738",
            "eventTime": "2022-03-20T16:38:00Z",

            "type": "deviated-manually-overridden",
            "id": 845,
            "createdAt": "2022-03-20T16:38:46.352751Z",
            "createdBy": "47"
        }
    ]
]

我不确定如何使用 groupBy 或 filter 来实现这个数据结构。我试过了：

events.groupBy(listOfEvents => listOfEvents.map(e => e.get('packageId')))

但是，这显然行不通。我该怎么办？

更新：

我已尝试按照答案的建议创建地图：

const grouped = Map<string, List>()
  events.map(list => list.map(event => {
    const packageId = event?.get('packageId')
    console.log('packageId ', packageId)
    if (packageId) {
      console.log('grouped packageId: ', grouped.get(packageId))
      if (!grouped.get(packageId)) {
        grouped.set(packageId, List())
      }
      const updatedList = grouped.get(packageId)?.push(event)
      console.log('updatedList: ', updatedList)
      if (updatedList) grouped.set(packageId, updatedList)
      console.log('grouped: ', grouped)
    }
  }))
  console.log('grouped ', grouped)

但是，这并没有在 Map 中设置任何值，我看到 packageId 已记录，但其他所有内容都未定义并以 0 的大小分组。我在这里做错了什么？