columns.columns Array

The columns which should be rendered as child columns under this group column header.

**Note that group column cannot be data bound and supports limited number of bound column settings - such as title, headerTemplate, locked

Example - set column group column for displaying multicolumn headers

<div id="grid"></div>
<script>
$("#grid").kendoGrid({
    columns: [
    {
        title: "Personal Info",
        columns: [
            { field: "name" },
            { field: "birthdate" }
        ]
    },
    {
        title: "Location",
        columns: [
            { field: "city" },
            { field: "country" }
        ]
    },
    {
        field: "phone"
    }
  ],
  editable: true,
  dataSource: [ { name: "Jane Doe", birthdate: new Date("1995/05/04"), city: "London", country: "UK", phone: "555-444-333" } ]
});
</script>
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