@Override
        public boolean include(Entry entry) {
          Object o = entry.getValue(modelIndex);
          if (o == null) {
            return true;
          }

          if (editor.getRenderer() != null) {
            return false;
          }

          Format fmt = editor.getFormat();
          String s = (fmt == null) ? o.toString() : fmt.format(o);
          return (s == null) || (s.trim().length() == 0);
        }
@Override
        public boolean include(Entry entry)