ungroup

The ungroup(fieldName) function removes currently enabled grouping for the given field.

$("#grid1").shieldGrid({
    dataSource: {
        data: products,
        group: [
            { field: "name", order: "desc" }
        ]
    },
    scrolling: true,
    height: 500,
    rowHover: false,
    columns: [
        { field: "id", width: 100, locked: true },
        { field: "name", width: "300px", locked: true },
        { field: "quantity", width: 200 },
        { field: "price", width: 100 }
    ]
});

var grid = $("#grid1").swidget();

// remove the grouping by "name"
grid.ungroup("name");

An example of the grouping functionality can be seen on this demo.