Nested lookup - how to flatten objects in an interative manner

Working with Data
1

I have a collection named network_groups and another collection named network_objects.
Each network group can contain multiple network_objects elements and group_objects( which are elements within the network_groups collection) as well.
Here is an example of each:

  1. item of network-groups:
{
  _id: ObjectId('...'),
  name: "CyM_PC",
  description:"CyM_PC (Outside, Inside)",
  network_objects: [
    "IN03PGSUR",
    "IN04PGSUR",
    "IN05PGSUR"
],
  group_objects: [
    "Other_Users"
]
}
  1. item of network-objects:
{
  _id: ObjectId('...'),
  name: "IN03PGSUR",
  description: "Created during migration"
}

The thing is inside group_objects there could be other network_groups items with network_groups inside and this could go on for a few layers.
I would like to extract all network_objects in the nested network_groups, so I have made a loopup query:

{
        "$lookup": {
            "from": "network_groups", 
            "localField": "group_objects", 
            "foreignField": "name", 
            "pipeline": [
                {
                    "$lookup": {
                        "from": "network_groups", 
                        "localField": "group_objects", 
                        "foreignField": "name", 
                        "as": "networks_inside"
                    }
                }
            ], 
            "as": "networks"
        }
    }

But this just covers 2 layers of nesting. I would like to keep going as long as there is a network_groups item with group_objects inside.
Is there a way to perform such an iterative query.

Thanks

2

Perhaps $graphLookup would serve your purpose since it does recursive lookup operations.