Bug 130094 [regression] cannot edit group in Cheat Sheets
steps to reproduce: - create a report using Grouped Listing template - switch to Cheat Sheets, start/restart the tutorial - follow the steps to 1) create data source; 2) create data set; 3) bind the data to the table; and 4) edit the group expected behavior: - group dialog should be displayed actual behavior: - error message displayed. please refer to the attached image for detail
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/views/DefaultNodeProvider.java
}
		return list.toArray( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.internal.ui.views.INodeProvider#getCommand(org.eclipse.gef.Request)
	 */
	public boolean performRequest( Object model, Request request )
			throws Exception
	{
		if ( request.getType( ).equals( IRequestConstants.REQUEST_TYPE_INSERT ) )
		{
			Map extendsData = request.getExtendedData( );
			SlotHandle slotHandle = (SlotHandle) extendsData.get( IRequestConstants.REQUEST_KEY_INSERT_SLOT );
			String type = (String) extendsData.get( IRequestConstants.REQUEST_KEY_INSERT_TYPE );
			String position = (String) extendsData.get( IRequestConstants.REQUEST_KEY_INSERT_POSITION );
			return performInsert( model,
					slotHandle,
					type,
					position,
					extendsData );
		}
		if ( request.getType( ).equals( IRequestConstants.REQUEST_TYPE_EDIT ) )
		{
			return performEdit( (ReportElementHandle) model );
		}
		if ( request.getType( ).equals( IRequestConstants.REQUEST_TYPE_DELETE ) )
		{
			return false;