private static final Log log = Log.lookup(Utils.class);
private static Format cloneCellFormat(Cell cell){
Format format = cell.getFormat();
if(format==null){
format = new FormatImpl();
}else if((format instanceof FormatImpl)){
try {
format = (FormatImpl)((FormatImpl)format).clone();
} catch (CloneNotSupportedException e) {
log.warning(e);