如何在Devextreme DataGrid中隐藏动态数据列

<div id="gridContainer"></div>

<script>
    var dataSource = [
        { id: 1, name: "John", age: 25 },
        { id: 2, name: "Jane", age: 30 },
        { id: 3, name: "Bob", age: 35 }
    ];

    var columns = [
        { dataField: "id", caption: "ID" },
        { dataField: "name", caption: "Name" },
        { dataField: "age", caption: "Age" }
    ];

    $("#gridContainer").dxDataGrid({
        dataSource: dataSource,
        columns: columns
    });
</script>

var columns = [
    { dataField: "id", caption: "ID" },
    { dataField: "name", caption: "Name" },
    { dataField: "age", caption: "Age", visible: false }
];

var columns = [
    { dataField: "id", caption: "ID" },
    { dataField: "name", caption: "Name" },
    { 
        dataField: "age", 
        caption: "Age", 
        visible: function(data) {
            return data.age <= 30;
        }
    }
];