layers.json

{
    "id": "root",
    "x": 0,
    "y": 0,
    "children": [{
        "id": "n1",
        "labels": [ { "text": "n1" } ],
        "width": 10,
        "height": 10,
        "x": 24,
        "y": 12
    },{
        "id": "n4",
        "labels": [ { "text": "n4" } ],
        "width": 10,
        "height": 10,
        "x": 25,
        "y": 176
    },{
        "id": "g0",
        "labels": [ { "text": "g0" } ],
        "width": 10,
        "height": 10,
        "x": 12,
        "y": 47,
        "children": [{
            "id": "n2",
            "labels": [ { "text": "n2" } ],
            "width": 10,
            "height": 10,
            "x": 20,
            "y": 99
        },{
            "id": "n3",
            "labels": [ { "text": "n3" } ],
            "width": 10,
            "height": 10,
            "x": 40,
            "y": 99
        }]
    }],
    "edges": [{
        "id": "e0",
        "source": "n1",
        "target": "n2"
    },{
        "id": "e1",
        "source": "n1",
        "target": "n3"
    },{
        "id": "e2",
        "source": "n2",
        "target": "n3"
    },{
        "id": "e3",
        "source": "n2",
        "target": "n4"
    },{
        "id": "e4",
        "source": "n3",
        "target": "n4"
    }]
}