{
    "type": "list",
    "children": [{
        "type": "cell",
        "attr": {
            "append": "tree"
        },
        "children": [{
            "type": "text",
            "attr": {
                "value": 1
            },
            "style": {
                "height": 600
            }
        }]
    }, {
        "type": "cell",
        "attr": {
            "append": "tree"
        },
        "children": [{
            "type": "text",
            "attr": {
                "value": 2
            },
            "style": {
                "height": 600
            }
        }]
    }, {
        "type": "cell",
        "attr": {
            "append": "tree"
        },
        "children": [{
            "type": "text",
            "attr": {
                "value": 3
            },
            "style": {
                "height": 600
            }
        }]
    }]
}