protected EscherAggregate getEscherAggregate ( HSSFSheet sheet ) { EscherAggregate agg = sheetToEscherAggregate . get ( sheet . getSheetName ( ) ) ; if ( agg == null ) { agg = sheet . getDrawingEscherAggregate ( ) ; sheetToEscherAggregate . put ( sheet . getSheetName ( ) , agg ) ; } return agg ; }
Returns EscherAggregate from sheet