public HSSFCellStyle getOrCreateStyle(HSSFWorkbook workbook, StyleVO styleVO) {
String keyString = styleVO.toString();
HSSFCellStyle style = reusableStyles.get(keyString);
if (style == null) {
style = workbook.createCellStyle();
styleVO.applyTo(style, workbook);
reusableStyles.put(keyString, style);
}
return style;
}
