Grouped Column
To group multiple columns under one cell header, use labels and children properties to be specified. Nested groups is supported.
{
   type: ColumnType .GROUP, label: 'Biodata', children: [
      { field: 'name' },
      { field: 'gender' },
      { field: 'email' },
   ]
}Nested group is supported. For example:
{
   type: ColumnType .GROUP, label: 'Other Data', children: [
      { field: 'country' },
      {
      type: ColumnType .GROUP, label: 'Date Info', children: [
         { field: 'enrolled' },
         { field: 'last_login' },
      ]
      },
      { field: 'verified' },
   ]
}
