code: public boolean isMatched(String value, Boolean defaultValue)
      {
          // @todo: there isn't a defaultValue for radio button, what should we do here?
          if (value == null)
              return false;
          if (_match != null)
              return value.equals(_match);
          if (_defaultRadio != null)
              return value.equals(_defaultRadio);
  
          return false;
      }
docs: Does the specified value match one of those we are looking for?
  @param value Value to be compared