SimpleDataSet.RESULT_SET_PROP );
IDataSetModel.RESULT_SET_PROP );
	private List doValidate( Module module, SimpleDataSet toValidate )	{		List list = new ArrayList( );		List columns = (List) toValidate.getProperty( module,				SimpleDataSet.RESULT_SET_PROP );		if ( columns != null && columns.size( ) == 0 )		{			list.add( new SemanticError( toValidate,					SemanticError.DESIGN_EXCEPTION_AT_LEAST_ONE_COLUMN ) );		}		return list;	}