How to export print list of two documents as byte array?

mainReport = JasperFillManager.fillReport(report, invoiceMap, new JREmptyDataSource());
tableReport = JasperFillManager.fillReport(table, taskListMap, new JREmptyDataSource());
List<JasperPrint> printList = new ArrayList<>();
printList.add(mainReport);
printList.add(tableReport);
 
JRPdfExporter exporter = new JRPdfExporter();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
exporter.setExporterInput(SimpleExporterInput.getInstance(printList)); //Set as export input my list with JasperPrint s
exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(System.getProperty("user.home") + "/output.pdf")); //or any other out streaam
SimplePdfExporterConfiguration configuration = new SimplePdfExporterConfiguration();
configuration.setCreatingBatchModeBookmarks(true); //add this so your bookmarks work, you may set other parameters
exporter.setConfiguration(configuration);
exporter.exportReport();