// 기본 그리드
  var theGrid = new wijmo.grid.FlexGrid('#theGrid', {
    allowMerging:"ColumnHeaders"
  });

  for(let i=0;i<=5;i++){
    let binding = 'time' + i
    theGrid.columns.push(new wijmo.grid.ColumnGroup( { binding: binding, header: i, width: '*', align: 'center' }))
    theGrid.columns.push(new wijmo.grid.ColumnGroup( { binding: binding, header: i, width: '*', align: 'center' }))
  }
  theGrid.columnHeaders.rows[0].allowMerging = true;