DataGrid com agrupamento (DataGrid Hierarquica)

<mx:AdvancedDataGrid x="11" y="37" width="1016" height="205"
							 id="dataGroup" initialize="gc.refresh();"
							 >
			<mx:dataProvider>
				<mx:GroupingCollection2 id="gc">
					<mx:grouping>
						<mx:Grouping>
							<mx:GroupingField name="descPerfil"/>
							<mx:GroupingField name="nomeUsuario"/>
						</mx:Grouping>
					</mx:grouping>
				</mx:GroupingCollection2>
			</mx:dataProvider>
			
			<mx:columns>
				
				<mx:AdvancedDataGridColumn dataField="dataPublicacao"
										   id="dataPublicacao"
										   headerText=" "
										   width="160"/>
				
				<mx:AdvancedDataGridColumn dataField="descNorma"
										   headerText="Norma"
										   id="descNorma"/>
				
				<mx:AdvancedDataGridColumn dataField="dataInclusao" 
										   headerText="Dt Inc"
										   id="dtInc"/>
				
				<mx:AdvancedDataGridColumn dataField="codigoNorma" 
										   headerText="Cod Int"
										   id="codNorma"/>
			</mx:columns>
			
		</mx:AdvancedDataGrid>