[
{
"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,