ungroupColumn

Method which performs ungroup action for the column with UniqueName specified as an argument.

ungroupColumn(colUniqueName)
colUniqueName	String	The UniqueName of the column that will be ungrouped.

Example:

            function UngroupByColumn() {
                var masterTable = $find("<%= RadGrid1.ClientID %>").get_masterTableView();
                masterTable.ungroupColumn("Country");
            }