HWPFFileSystem fileSys = new HWPFFileSystem();
HWPFOutputStream tableOut = fileSys.getStream("1Table");
HWPFOutputStream mainOut = fileSys.getStream("WordDocument");
_styleSheet.writeTo(tableOut);
byte[] newTableStream = tableOut.toByteArray();
StyleSheet newStyleSheet = new StyleSheet(newTableStream, 0);
assertEquals(newStyleSheet, _styleSheet);