无法使树列可见

如何解决无法使树列可见

我一直在使用http://tabulator.info/docs/4.7/tree这个制表器表的相同示例，并且已根据我的数据删除了一些列，但是第一列未显示完整的数据（值）〜请检查以下屏幕截图。

这是代码段。

var tableDatanested = [
            {
                name: "Folder 1",date: "14/04/1984",_children: [
                    { name: "Mary May",date: "14/05/1982" },{ name: "Christine Lobowski",date: "22/05/1982" },{
                        name: "Brendon Philips",date: "01/08/1980",_children: [
                            { name: "Margret Marmajuke",date: "31/01/1999" },{ name: "Frank Harbours",date: "12/05/1966" },]
                    },]
            },{ name: "Jamie Newhart",date: "14/05/1985" },{
                name: "Gemma Jane",date: "22/05/1982",_children: [
                    { name: "Emily Sykes",date: "11/11/1970" },{ name: "James Newman",date: "22/03/1998" },];

        var table = new Tabulator("#example-table",{
            height: "311px",dataTree: true,dataTreeStartExpanded: true,columns: [
                { title: "Name",field: "name",width: 200},//never hide this column
                { title: "Date",field: "date",hozAlign: "center",sorter: "date",width: 150 },],});
table.setData(tableDatanested)

我想念一些东西可以有人帮我吗？