@Override
 public void setPrimitiveDataStyleName(Optional<String> styleName) {
   checkNotNull(styleName);
   if (lastStyleName.isPresent()) {
     delegate.getSuggestBox().removeStyleName(lastStyleName.get());
   }
   lastStyleName = styleName;
   if (styleName.isPresent()) {
     delegate.getSuggestBox().addStyleName(styleName.get());
   }
 }