Column group horizontally or vertically arranges one or more columns or child column groups within its area.
It specifies the arrangement location of child columns by layout property. In addition, when create columns by calling GridBase.columns, it will specify "type" as "group".
grid.setColumns([{
type: "group",
layout: "vertical",
columns: [{
name: "colName",
fieldName: 'name"
}, {
name: "colAddr",
fieldName: 'address"
},
...
]
},
...
]);