[
    {
        "name": "john",
        "age": 42,
        "isCustomer": false,
        "children": []
    },
    {
        "name": "james",
        "age": 35,
        "isCustomer": true,
        "children": [
            {
                "name": "linus",
                "age": 4
            },
            {
                "name": "sandra",
                "age": 2
            }
        ]
    },
    {
        "name": "jessica",
        "age": null,
        "isCustomer": false,
        "children": []
    }
]