assertNull( ish.findFirstRecordBySid(ObjRecord.sid) ); // ObjRecord will appear after serializetion
wb = HSSFTestDataSamples.writeOutAndReadBack(wb);
sh = wb.getSheetAt(0);
ish = sh.getSheet();
ObjRecord objRecord = (ObjRecord)ish.findFirstRecordBySid(ObjRecord.sid);
List<SubRecord> subRecords = objRecord.getSubRecords();
assertEquals(3, subRecords.size());
assertTrue(subRecords.get(0) instanceof CommonObjectDataSubRecord );
assertTrue(subRecords.get(1) instanceof FtCblsSubRecord ); // must be present, see Bug 51481
assertTrue(subRecords.get(2) instanceof LbsDataSubRecord );