Expand all row initially not working about table HOT 6 CLOSED

class AssesmentTable extends Component {
render() {
const {routes, strandData} = this.props;
const columns = [
  {
    title: 'Name',
    dataIndex: 'name',
    key: 'name',
    width: 300,
    fixed: 'left'
  }, {
    title: 'Age',
    dataIndex: 'age',
    key: 'age'
  }, {
    title: 'Address',
    dataIndex: 'address',
    key: 'address'
  }
];

const data = [
  {
    name: 'Jack',
    age: 28,
    address: 'some where',
    children: [
      {
        name: 'a2-1',
        b: 'b2-1'
      }, {
        name: 'a2-2',
        b: 'b2-2'
      }
    ]
  }, {
    name: 'Rose',
    age: 36,
    address: 'some where'
  }
];
/*  take out everything required from props */

return (
  <div className="panel-body">
    <Table columns={columns} style={{
      width: 800
    }} data={data} expandIconAsCell={true} defaultExpandAllRows={true} scroll={{
      x: 1200
    }}/>
  </div>
);
}
}