return UIUtil.getColumnList( (DataSetHandle) parent );
try { return DataUtil.getColumnList( (DataSetHandle) parent ); } catch ( SemanticException e ) { ExceptionHandler.handle( e ); return Collections.EMPTY_LIST; }
	protected List getChildrenList( Object parent )	{		if ( DATASETS.equals( parent ) )		{			List dataSeList = new ArrayList( );			dataSeList.add( dataSetHandle );			return dataSeList;		}		if ( parent instanceof DataSetHandle )		{			return UIUtil.getColumnList( (DataSetHandle) parent );		}		return super.getChildrenList( parent );	}