jqGrid没有addJSONData方法

{
    "data": [
        {
            "id": 1,
            "name": "张三",
            "age": 28
        },
        {
            "id": 2,
            "name": "李四",
            "age": 32
        }
    ],
    "datatype": "local",
    "localReader": {
        "id": "id",
        "name": "name",
        "age": "age"
    }
}

jQuery("#myGrid").jqGrid({
    url: "/api/mydata",
    datatype: "json",
    mtype: "POST",
    height: 200,
    width: 300,
    colModel: [
        { name: "id", width: 80 },
        { name: "name", width: 120 },
        { name: "age", width: 80, sortable: false }
    ],
    rowNum: 10,
    sortname: "id",
    sortorder: "asc"
});