if ( DEUtil.getDataSetList( getTableHandle( ) ).isEmpty( ) ) { return null; }
	public TableGroupHandle insertGroup( ) throws ContentException, NameException	{		transStar( TRANS_LABEL_INSERT_GROUP );		RowHandle header = getTableHandle( ).getElementFactory( ).newTableRow( );		RowHandle footer = getTableHandle( ).getElementFactory( ).newTableRow( );		addCell( header );		addCell( footer );		TableGroupHandle groupHandle = getTableHandle( ).getElementFactory( )				.newTableGroup( );		groupHandle.getSlot( TableGroup.HEADER_SLOT ).add( header );		groupHandle.getSlot( TableGroup.FOOTER_SLOT ).add( footer );		SlotHandle handle = getTableHandle( ).getGroups( );		handle.add( groupHandle );		transEnd( );		return groupHandle;	}