.getPropertyHandle( DataSetHandle.RESULT_SET_PROP ), columns );
.getPropertyHandle( IDataSetModel.RESULT_SET_PROP ), columns );
	public static void addResultSetColumn( DataSetHandle dataSetHandle,			List columns ) throws SemanticException	{		if ( dataSetHandle == null )			return;		addStructures( dataSetHandle				.getPropertyHandle( DataSetHandle.RESULT_SET_PROP ), columns );	}